US Pat. No. 9,698,882

RECONFIGURABLE SINGLE AND MULTI-SECTOR CELL SITE SYSTEM

Andrew Wireless Systems G...

11. A telecommunications system, comprising:
a phase shifter positionable at a radio frequency (RF) source site;
antennas positionable at a sectorized antenna sub-system site communicatively coupled to RF sources at the RF source site;
and

a phase correlation measurement unit positionable at the sectorized antenna sub-system site, the phase correlation measurement
unit being configured for outputting signals for controlling the phase shifter for phase shifting system signals and for causing
operation of the sectorized antenna sub-system site as an omnidirectional antenna sub-system, wherein the telecommunications
system is switchable between operating in an omnidirectional operation mode and a multiple sector operation mode in response
to a control signal.

US Pat. No. 9,203,503

DIGITAL REPEATER HAVING BANDPASS FILTERING, ADAPTIVE PRE-EQUALIZATION AND SUPPRESSION OF NATURAL OSCILLATION

Andrew Wireless Systems G...

1. A signal repeating system, comprising:
at least one input antenna that receives input signals, at least one output antenna that radiates output signals, and a signal
path between the input and output antennas;

the signal path including:
down conversion and analog-to-digital conversion circuitry that converts the received input signals to lower frequency signals
and that converts the received input signals to digital input signals;

a suppression circuit for processing the digital input signals to produce digital output signals and for suppressing feedback
and interference in the digital output signals, the suppression circuit including:

a digital signal processor configured to receive the digital input signals, the digital output signals, and a digital interference
reference signal;

an adaptive filter coupled with the digital signal processor, the adaptive filter configured, under the control of the digital
signal processor, for generating cancellation signals;

the digital signal processor configured for computing a correlation between the digital input signals and the digital output
signals and creating control signals for the adaptive filter to generate echo cancellation signals;

the digital signal processor further configured to compute a correlation between the digital interference reference signal
and the digital output signals and creating control signals for the adaptive filter to generate interference cancellation
signals;

combining circuitry for destructively adding the echo cancellation signals and the interference cancellation signals to the
digital input signals for reducing echo and interference in the digital output signals of the signal repeating system;

digital-to-analog conversion circuitry that converts the digital output signals to analog output signals and up conversion
circuitry that converts the analog output signals to higher frequency signals.

US Pat. No. 9,627,782

CONNECTING ELEMENT

Andrew Wireless Systems G...

1. A connecting element for RF, the connecting element comprising:
a plug part axially displaceably mounted in a mounting module and supported by a prestressing means for counteracting a plugging
force;

an internal conductor that extends in an axial direction;
an external conductor that surrounds the internal conductor, wherein the internal conductor and the external conductor are
shaped at an end of the plug part to form a plug connection; and

a plate spring arranged within the external conductor to encircle the internal conductor at a base of the external conductor.

US Pat. No. 10,027,402

REPEATER SYSTEM FOR USE ON A MOVEABLE OBJECT

Andrew Wireless Systems G...

1. A repeater system comprising:a first master unit positionable at a first location on a movable object and a second master unit positionable at a second location on the movable object, the first master unit and the second master unit being configured to communicatively couple to antennas for receiving a downlink RF signal from at least one base station external to the movable object and for transmitting an uplink RF signal towards the at least one base station; and
remote units configured to couple through a transport medium to the first master unit by a first connection and to the second master unit by a second connection, the remote units being positionable on the movable object and associated with different coverage areas within the movable object, the remote units being configured to couple to antenna systems for transmitting the downlink RF signal into associated coverage areas of the movable object and for receiving the uplink RF signal from the coverage areas,
wherein, for at least a subgroup of the remote units, a first gain for the first connection and a second gain for the second connection are controllable by a control unit.

US Pat. No. 9,948,262

ADAPTIVE SUPPLY VOLTAGE FOR A POWER AMPLIFIER

Andrew Wireless Systems G...

1. A signal-processing system for generating an amplified output signal based on an input signal, the system comprising:an amplifier configured to generate the output signal, wherein the amplifier is configured to receive a supply voltage; and
a limiter configured to inhibit increases in the input signal power level from being applied to the amplifier, wherein the limiter comprises:
a variable attenuator configured to selectively attenuate the input signal before being applied to the amplifier;
wherein the limiter integrates over a voltage difference between a current measure of attenuated input signal power level and a limiter threshold level to control a level of attenuation applied by the variable attenuator to the input signal;
wherein a control unit is configured to drive the limiter threshold level as a function of the supply voltage.

US Pat. No. 10,142,009

INTERFACE MODULE FOR A UNIT OF AN ANTENNA DISTRIBUTION SYSTEM, AND ANTENNA DISTRIBUTION SYSTEM

Andrew Wireless Systems G...

1. A distributed antenna system comprising:at least one master unit communicatively coupled to at least one base station; and
a plurality of remote units located remotely from the at least one master unit, wherein each of the plurality of remote units is communicatively coupled to the master unit over at least one transport communication link;
the system configured to distribute a first signal, received from the at least one base station, from the master unit to at least one remote unit in analog form, wherein the at least one remote unit radiates a second signal derived from the first signal from at least one antenna associated with the at least one remote unit;
a digital circuit configured to generate digital samples by digitally sampling the first signal;
a network interface for communicating with an external central control computer configured for central control of the distributed antenna system, wherein the external central control computer is distinct from the at least one base station;
the digital circuit configured to process the digital samples and communicate information about parameters of the first signal to the external central control computer via the network interface.

US Pat. No. 9,686,007

WIRELESS COMMUNICATION NETWORK USING FREQUENCY CONVERSION OF MIMO SIGNALS

Andrew Wireless Systems G...

17. A communication network for wireless communication comprising:
a base station configured for transmitting and receiving a communication signal on at least two equal-frequency MIMO-coded
information channels;

a wireless terminal configured for transmitting and receiving a communication signal on at least two equal-frequency MIMO-coded
information channels;

at least one repeater coupled between the base station and the wireless terminal, the repeater being configured for receiving,
passing through and retransmitting communication signals on at least two equal-frequency MIMO-coded information channels and
containing a converting device for frequency conversion of at least one information channel passed therethrough;

a test receiver configured for determining unused frequency ranges, situated outside the frequency bands allocated to mobile
radio for wireless communication, the test receiver coupled with a data base storing frequency ranges unused for wireless
communication that are situated outside the frequency bands allocated to mobile radio, the test receiver being coupled with
the converting device of the repeater and the converting device configured for carrying out the frequency conversion in at
least one communication direction (UL, DL) to a frequency from the unused frequency ranges situated outside the frequency
bands allocated to mobile radio so that the MIMO-coded information channels are then transmitted using different frequencies
compared to each other;

the repeater being configured for transmitting the communication signal wirelessly with the at least one frequency-converted
information channel in the at least one communication direction so that at least one frequency-converted MIMO-coded information
channel is transported on a different frequency outside the frequency bands allocated to mobile radio.

US Pat. No. 9,974,071

SMALL CELL NETWORK ARCHITECTURE FOR SERVICING MULTIPLE NETWORK OPERATORS

Andrew Wireless Systems G...

1. A management sub-system for managing a small cell network servicing a plurality of network operators the system comprising:a controller in communication with a plurality of core networks, wherein each of the plurality of core networks is operated by a separate network operator providing telecommunication services to terminal devices; and
a plurality of baseband processing units in communication with the controller, wherein each of the plurality of baseband processing units is configured to process data plane data and control plane data from at least one respective core network of the plurality of core networks for distribution via a plurality of remote antenna units of the small cell network;
wherein the plurality of remote antenna units are remotely located from the plurality of baseband processing units;
wherein at least one of the plurality of remote antenna units is remotely located from at least one other remote antenna unit;
wherein the management sub-system is configured for providing a respective amount of capacity via the small cell network for each core network of the plurality of core networks based on a respective subset of the plurality of baseband processing units assigned to the core network; and
wherein the controller is configured to allocate radio resources by:
determining, for each of the plurality of network operators, a respective number of terminal devices communicating with a respective core network of the network operator via the small cell network; and
allocating a respective portion of the radio resources to each network operator based on the respective number of terminal devices.

US Pat. No. 9,774,368

TDD REPEATER FOR A WIRELESS NETWORK AND METHOD FOR OPERATING SAID REPEATER

Andrew Wireless Systems G...

11. A method for time-division duplex (TDD) signal repeating comprising:
communicating communication signals with a master unit from a base station of a wireless network;
transmitting the communication signals with a waveguide between the master unit and at least one remote unit including selectively
transmitting the communication signals in an uplink direction and in a downlink direction;

in the at least one remote unit, having a defined uplink path and a separate defined downlink path, using a switch coupled
with each of the defined paths for changing direction of the signal transmission between transmission in the uplink direction
and transmission in the downlink direction;

in the at least one remote unit, processing a signal portion of the signals in at least one of the uplink direction and the
downlink direction and using the processed signal portion for determining the direction of the repeater system signal transmission
and for controlling the remote unit switch and the signal transmission direction;

wherein the signal portion is derived from a radio-frequency (RF) control signal generated by the TDD repeater system and
wherein the control unit drives the remote unit switch at a frequency determined from the processed signal portion.

US Pat. No. 9,768,840

DISTRIBUTED ANTENNA SYSTEM FOR MIMO COMMUNICATIONS

Andrew Wireless Systems G...

1. A method for determining placement of a plurality of simulated antennas of a simulated distributed antenna system for handling
simulated MIMO signals in a simulated environment comprising:
at a first simulated location within the simulated environment, simulating communication of a first simulated MIMO signal
by a first remote unit over a first simulated air interface in the simulated environment;

at a second simulated location within the simulated environment, simulating communication of a second simulated MIMO signal
by a second remote unit over a second simulated air interface in the simulated environment;

the first simulated location and the second simulated location arranged within the simulated environment to provide overlapping
simulated signal coverage of both the first simulated MIMO signal and the second simulated MIMO signal at a third simulated
location in the simulated environment; and

analyzing at least a simulated imbalance of simulated received power between the first simulated MIMO signal and the second
simulated MIMO signal within the simulated environment at a third simulated location in order to determine whether a desired
capacity for simulated MIMO communications with the simulated distributed antenna system is achieved at the third simulated
location in the simulated environment.

US Pat. No. 9,894,623

UPLINK PATH INTEGRITY DETECTION IN DISTRIBUTED ANTENNA SYSTEMS

Andrew Wireless Systems G...

1. A distributed antenna system comprising:
a remote antenna unit configured to communicate with wireless devices in a coverage area;
one or more additional remote antenna units configured to communicate with wireless devices in one or more additional coverage
areas; and

a unit configured for communicating with the remote antenna unit and the one or more additional remote antenna units, the
unit comprising a distributed antenna system controller that is configured to:

determine that an undesirable signal component having a signal power exceeding a threshold power is communicated via an uplink
path from the remote antenna unit; and

minimize an impact of the undesirable signal component on the additional coverage areas of the one or more additional remote
antenna units, wherein minimizing the impact comprises modifying the gain of the uplink path over which the undesirable signal
component is communicated as a function of a measured signal power of the undesirable signal component in the uplink path
from the remote antenna unit.

US Pat. No. 10,097,257

WIRELESS COMMUNICATIONS NETWORK USING FREQUENCY CONVERSION OF MIMO SIGNALS

Andrew Wireless Systems G...

1. A repeater for wireless communication comprising:circuitry configured to receive a first MIMO-coded information channel and a second MIMO-coded information channel at a first frequency;
a converting device configured to convert the first MIMO-coded information channel to a second frequency using information from a test receiver configured to determine unused frequency ranges that are situated outside frequency bands allocated to mobile radio for wireless communication, wherein the test receiver is communicatively coupled with the converting device, wherein the converting device is configured to convert the first MIMO-coded information channel to the second frequency in at least one communication direction, wherein the second frequency is within the unused frequency ranges situated outside the frequency bands allocated to mobile radio; and
circuitry configured to transmit the first MIMO-coded information channel and the second MIMO-coded information channel in the at least one communication direction, wherein the first MIMO-coded information channel and the second MIMO-coded information channel are transmitted using different frequencies compared to each other.

US Pat. No. 10,009,090

SYSTEM AND METHOD FOR REDUCING DESENSITIZATION OF A BASE STATION TRANSCEIVER FOR MOBILE WIRELESS REPEATER SYSTEMS

Andrew Wireless Systems G...

1. A repeater system, comprising:operational circuitry configured to repeat signals between at least one device and at least one signal source, the operational circuitry including receiver circuitry configured to receive downlink signals from a plurality of signal sources and to receive uplink signals from at least one device and transmitter circuitry configured to transmit uplink signals to at least one signal source;
controller circuitry configured to control the transmitter circuitry and to monitor at least one downlink signal parameter from a plurality of signal sources and at least one uplink signal parameter from the device, the controller circuitry further configured to use the monitored parameters to determine whether transmitted uplink signals will desensitize the operation of at least one of the plurality of signal sources and to adjust the power level of the transmitted uplink signals to avoid desensitization.

US Pat. No. 9,271,289

SWITCHING SUB-SYSTEM FOR DISTRIBUTED ANTENNA SYSTEMS USING TIME DIVISION DUPLEXING

ANDREW WIRELESS SYSTEMS G...

1. A switching control module comprising:
a measurement receiver configured for measuring a signal power in a downlink path of a distributed antenna system; and
a processor communicatively coupled to the measurement receiver, wherein the processor is configured for optimizing time division
duplexing operations of the distributed antenna system by:

determining an initial clock setting that controls a timing for generating switching signals that instruct at least one switch
in an uplink path or the downlink path of the distributed antenna system to switch the distributed antenna system between
an uplink mode and a downlink mode, wherein the processor is configured for determining the initial clock setting by performing
operations comprising:

obtaining multiple downlink sub-frame samples, wherein each downlink frame sample corresponds to a respective power measurement
by the measurement receiver;

determining a ratio between downlink sub-frames and uplink sub-frames for signals-communicated via the distributed antenna
system, and

determining the initial clock setting based on the ratio;
determining multiple start times or end times for respective downlink sub-frames transmitted via the downlink path, wherein
the processor is configured for determining each start time or end time based on the signal power measured by the measurement
receiver exceeding a threshold signal power; and

updating the initial clock setting based on a switching time adjustment statistically determined from multiple switching time
differentials, wherein each of the switching time differentials comprises a respective difference between the initial clock
setting and a respective start time or end time.

US Pat. No. 9,913,147

CAPACITY OPTIMIZATION SUB-SYSTEM FOR DISTRIBUTED ANTENNA SYSTEM

Andrew Wireless Systems G...

1. A capacity optimization sub-system for distributing capacity in a distributed antenna system, the capacity optimization
sub-system comprising:
a switch matrix having a plurality of variable attenuators and a plurality of switches, the switch matrix configured to receive
a plurality of sectors from a plurality of base stations and to provide the plurality of sectors to a plurality of coverage
zones, and being communicatively coupled to a plurality of remote antenna units providing service to the plurality of coverage
zones; and

a controller communicatively coupled to the switch matrix, the controller configured to:
determine that a number of wireless devices in one or more of the plurality of coverage zones is outside a specified range
of threshold traffic levels, and

in response to determining that the number of wireless devices is outside the specified range of threshold traffic levels,
configure one or more of the plurality of variable attenuators and one or more corresponding switches to redistribute capacity
among the plurality of coverage zones.

US Pat. No. 9,860,845

INTERFACE DEVICE PROVIDING POWER MANAGEMENT AND LOAD TERMINATION IN DISTRIBUTED ANTENNA SYSTEM

Andrew Wireless Systems G...

1. An interface device for a distributed antenna system, the interface device comprising:
a port configured for communicatively coupling the interface device to a base station and a switching component coupled to
the port, wherein the switching component is switchable from a first configuration to a second configuration, the first configuration
connecting the port to a downlink path from the interface device to a unit of the distributed antenna system, the second configuration
connecting the port to a signal reflection path;

a power detector communicatively coupled to the port and configured to measure a signal power of an input signal at the port;
and

a processing device communicatively coupled to the power detector, the processing device configured for:
determining that the measured signal power of the input signal exceeds a threshold signal power, and
switching the switching component from the first configuration to the second configuration in response to determining that
the measured signal power exceeds the threshold signal power.

US Pat. No. 9,712,343

SCALABLE TELECOMMUNICATIONS SYSTEM

Andrew Wireless Systems G...

1. A node unit for a scalable telecommunications system, the node unit comprising:
a plurality of universal digital radio frequency (RF) transceivers, wherein each of the plurality of universal digital RF
transceivers is configured to communicatively couple the node unit to a respective external equipment;

one or more universal digital transport interfaces, wherein each of the one or more universal digital transport interfaces
is configured to communicatively couple the node unit to a respective transport link;

a universal backplane communicatively coupled to the plurality of universal digital RF transceivers and to the one or more
universal digital transport interfaces; and

a system controller;
wherein the node unit is configured to have inserted therein a respective power amplifier and duplexer for each universal
digital RF transceiver;

wherein the node unit is configured to communicatively couple an input of each power amplifier to an output of the plurality
of universal digital RF transceivers;

wherein the node unit is configured to communicatively couple each universal digital RF transceiver to the respective external
equipment via the respective duplexer;

wherein at least one of the universal digital RF transceivers, the universal digital transport interfaces, the universal backplane,
and the respective power amplifier and duplexer comprises a respective module identification (ID); and

wherein the system controller is configured to read the respective module ID and to configure the operation of at least one
of the universal digital RF transceivers, the universal digital transport interfaces, and the universal backplane based on
the respective module ID.

US Pat. No. 9,258,053

INTERFACE MODULE FOR A UNIT OF AN ANTENNA DISTRIBUTION SYSTEM, AND ANTENNA DISTRIBUTION SYSTEM

Andrew Wireless Systems G...

1. An interface module for a unit designed to transmit and/or amplify communication signals inside an antenna distribution
system, the interface module comprising:
a first analog interface for forwarding and receiving communication signals from mobile terminals;
a second interface for forwarding and receiving communication signals from the antenna distribution system;
at least one signal path for forwarding the received communication signals between the first and second interfaces;
a controllable digital unit in the signal path that is configured for digitizing incoming communication signals to digital
signals and converting outgoing communication signals to analog signals, the controllable digital unit being configured to
evaluate characteristic signal parameters of the digital communication signals and, based on the evaluation, to select a subset
of signals from the digital communication signals wherein the selected subset is separate from remaining communication signals,
the controllable digital unit further configured for processing and forwarding the selected subset of signals apart from the
remaining communication signals;

a communication unit coupled with the controllable digital unit and configured for receiving control data for determining
how the subset of signals is processed and forwarded.

US Pat. No. 9,246,559

DISTRIBUTED ANTENNA SYSTEM FOR MIMO SIGNALS

Andrew Wireless Systems G...

1. A system comprising:
a multiple-input and multiple-output (MIMO) signal source operable for providing MIMO signals including at least a first MIMO
signal and at least a second MIMO signal;

a plurality of remote units communicating with the MIMO signal source and configured to receive the first MIMO signal and
second MIMO signal, each remote unit providing the MIMO signals at respective output ports;

at least one radiating cable element for radiating signals into a space;
a hybrid coupler coupled between the output ports of a remote unit and the cable radiating element and configured to receive
the first MIMO signal and the second MIMO signal from the remote unit on respective input ports and to provide an output signal
on at least one output port, the output signal including at least a portion of the first MIMO signal and at least a portion
of the second MIMO signal;

the radiating cable element coupled with the at least one output port.

US Pat. No. 9,219,524

TDD REPEATER FOR A WIRELESS NETWORK AND METHOD FOR OPERATING SAID REPEATER

Andrew Wireless Systems G...

1. A time-division duplex (TDD) repeater system comprising:
a master unit configured for communicating with a base station of a wireless network;
at least one remote unit configured for communicating with a terminal device and located away from the master unit;
a waveguide connecting the remote unit with the master unit for transmitting communication signals in an uplink direction
and in a downlink direction;

the at least one remote unit having a defined uplink path and a separate defined downlink path and including a switch coupled
to each of the defined paths for changing direction between the signal transmission in the uplink direction and the signal
transmission in the downlink direction;

the master unit configured for generating a control signal and directing downlink signals, including the communication signals
and the control signal in the downlink direction, to the remote unit;

the control signal portion of the downlink signals from the master unit to the remote unit acting as a control signal in the
remote unit for controlling the direction of the switch in the remote unit between the defined paths in the uplink and downlink
directions;

a control unit located in the remote unit, and the remote unit configured for coupling the control signal portion of the downlink
signals to the control unit, the control unit configured for processing the control signal portion and determining the direction
of the repeater system signal transmission, the control unit further configured to generate signals to the remote unit switch
based on the control signal to control the switch direction.

US Pat. No. 9,787,385

DISTRIBUTED ANTENNA SYSTEM FOR MIMO SIGNALS

Andrew Wireless Systems G...

1. A distributed antenna system comprising:
at least one master unit within the distributed antenna system;
a plurality of remote units within the distributed antenna system, the plurality of remote units distributed to provide coverage
within a service area, each of the plurality of remote units remotely located from each other and the at least one master
unit, the plurality of remote units coupled with the at least one master unit;

at least one antenna coupled with each of the remote units;
a coupler element coupled to receive a plurality of multiple-input and multiple-output (MIMO) signals, including at least
first and second MIMO signals of the plurality of MIMO signals, the coupler element configured for introducing a phase shift
in a portion of at least the first MIMO signal and for combining the phase shifted first MIMO signal portion with a portion
of the second MIMO signal and presenting the combined first and second MIMO signal portions at a first output port of the
coupler element;

at least one antenna coupled for receiving the combined first and second MIMO signal portions of the first output port for
transmission.

US Pat. No. 10,511,376

REPEATER AND METHOD FOR OPERATING SUCH A REPEATER

Andrew Wireless Systems G...

1. A telecommunications system, comprising:a master unit;
remote units;
wherein the remote units are configured to communicate with mobile radio terminals and to communicate with the master unit, where at least one of the remote units including a sensor and a control circuit, the sensor being configured to detect a parameter about a coverage environment, the control circuit being configured to cause the at least one of the remote units to switch between a passive operating state and an active operating state based on the parameter; and
wherein the at least one of the remote units transmits signals wirelessly at a higher power in the active operating state as compared to the passive operating state, wherein the control circuit is further configured to cause the at least one of the remote units to switch between the passive operating state and the active operating state at a rate that maintains a transmission of downlink signals by the at least one of the remote units.

US Pat. No. 10,199,704

METHOD FOR COMPENSATING A TEMPERATURE DRIFT OF A MICROWAVE FILTER

Andrew Wireless Systems G...

1. A method for compensating a temperature drift of a microwave filter, the method comprising:measuring a first frequency response of the microwave filter comprising multiple resonant filter elements at a first temperature to obtain a first measured frequency response,
adjusting model elements in an equivalent circuit corresponding to the microwave filter such that a first modelled frequency response computed using the equivalent circuit matches the first measured frequency response to obtain a first model modelling the microwave filter at the first temperature,
measuring a second frequency response of the microwave filter at a second temperature to obtain a second measured frequency response,
adjusting the model elements in the equivalent circuit corresponding to the microwave filter such that a second modelled frequency response computed using the equivalent circuit matches the second measured frequency response to obtain a second model modelling the microwave filter at the second temperature,
determining a temperature drift of a resonant frequency for each of the multiple resonant filter elements using the first model and the second model, and
adjusting an overall temperature drift of the microwave filter by using tuning mechanisms on at least one of the multiple resonant filter elements to adjust the temperature drifts of the resonant filter elements.

US Pat. No. 10,182,409

UPLINK PATH INTEGRITY DETECTION IN DISTRIBUTED ANTENNA SYSTEMS

Andrew Wireless Systems G...

1. A distributed antenna system, the system comprising:at least one master unit;
a plurality of remote antenna units each in communication with the at least one master unit; and
a system controller configured to:
determine a noise figure for an uplink path from at least one of the plurality of remote antenna units; and
modify a gain of the uplink path when the noise figure exceeds a desired threshold, wherein the noise figure is determined as a function of a measured signal power of an undesirable signal component in the uplink path from the remote antenna unit.

US Pat. No. 10,142,036

CONFIGURATION SUB-SYSTEM FOR TELECOMMUNICATION SYSTEMS

Andrew Wireless Systems G...

1. A configuration sub-system comprising:an input communicatively coupleable to a base station;
a test signal generator integrated into the configuration sub-system, wherein the configuration sub-system is configured to switch between a first mode and a second mode, wherein in the first mode the configuration sub-system is configured to provide a test signal generated by the test signal generator to a downlink path, wherein in the second mode the configuration sub-system is configured to provide an RF downlink signal that is received via the input from the base station to the downlink path and deactivate the test signal generator, wherein the configuration sub-system is configured to provide the RF downlink signal to the downlink path only in the second mode;
a power measurement device integrated into the configuration sub-system, the power measurement device being configured to:
measure a test signal power of the test signal at a measurement point in the downlink path, and
measure a downlink signal power of the RF downlink signal at the measurement point; and
a controller configured to normalize signals transmitted using a distributed antenna system via the configuration sub-system by adjusting a downlink path gain for the downlink path based on the test signal power measured by the power measurement device, wherein the distributed antenna system is configured to transmit the RF downlink signal using the downlink path gain as adjusted by the controller.

US Pat. No. 10,062,948

MICROWAVE CAVITY RESONATOR

Andrew Wireless Systems G...

1. A microwave cavity resonator, comprising:a cavity housing forming a cavity, the cavity housing comprising a first housing wall and a second housing wall opposite the first housing wall, and
a resonator element arranged in the cavity and extending longitudinally along a longitudinal axis, wherein the resonator element comprises, when viewed along the longitudinal axis, a first end connected to the first housing wall and a second end opposite the first end, the second end being arranged at a distance from the second housing wall,
wherein the resonator element, at the second end thereof, comprises at least one first capacitor element and the cavity housing comprises at least one second capacitor element reaching into the cavity and arranged at a distance, when viewed along a direction perpendicular to the longitudinal axis, from the at least one first capacitor element such that a gap between the at least one first capacitor element and the at least one second capacitor element is formed;
wherein a shaft of a tuning device is arranged coaxially to the at least one first capacitor element and the at least one second capacitor element and reaches into an opening formed at the second end of the resonator element.

US Pat. No. 10,244,507

DISTRIBUTED PROCESSING IN A CENTRALIZED RADIO ACCESS NETWORK

Andrew Wireless Systems G...

1. A centralized radio access network (C-RAN), comprising:a media access control (MAC) scheduler; and
a fronthaul physical layer coordinator positioned between the MAC scheduler and a plurality of remote units, the fronthaul physical layer coordinator including a fronthaul physical layer scheduler for determining at least one remote unit of the plurality of remote units to serve a mobile device, wherein the fronthaul physical layer coordinator is configured for formulating an allocation of physical layer processing between the plurality of remote units and a baseband processing unit based on resources selected by the fronthaul physical layer scheduler and the MAC scheduler for serving the mobile device.

US Pat. No. 10,133,892

SYSTEM FOR CHARACTERIZING A PASSIVE ANTENNA NETWORK AND ELEMENTS IN A DISTRIBUTED ANTENNA SYSTEM

Andrew Wireless Systems G...

1. A distributed antenna system comprising:a plurality of remote antenna units, a first passive element coupled to at least one of the remote antenna units at a connection juncture; and
an RFID system associated with the first passive element and having RFID data identifying the first passive element;
wherein the system is configured so that at least one signal transmitted to the first passive element is reflected at the connection juncture;
wherein the system is configured so that at least one signal transmitted to the RFID system is used to obtain the RFID data identifying the first passive element; and
wherein the system further comprises processing circuitry configured to process the reflected signal and to measure a parameter of the first passive element.

US Pat. No. 9,553,656

SYSTEM AND METHOD FOR REDUCING DESENSITIZATION OF A BASE STATION TRANSCEIVER FOR MOBILE WIRELESS REPEATER SYSTEMS

Andrew Wireless Systems G...

1. A repeater system comprising:
operational circuitry configured for repeating signals between at least one device and at least one signal source, the operational
circuitry including receiver circuitry for receiving downlink signals from a plurality of signal sources and for receiving
uplink signals from at least one device and transmitter circuitry for transmitting uplink signals to at least one signal source;

controller circuitry configured for controlling the transmitter circuitry and for monitoring at least one downlink signal
parameter from a plurality of signal sources and at least one uplink signal parameter from the device, the controller circuitry
comparing the downlink signal parameters from the plurality of signal sources to each other and determining a comparison value;

the controller circuitry further configured for using the monitored parameters and the determined comparison value to determine
whether transmitted uplink signals will desensitize the operation of at least one of the plurality of signal sources and for
adjusting the power level of the transmitted uplink signals to avoid desensitization.

US Pat. No. 9,184,962

DISTRIBUTED ANTENNA SYSTEM FOR MIMO SIGNALS

Andrew Wireless Systems G...

1. A system comprising:
circuitry for coupling with a source of a multiple-input and multiple-output (MIMO) signal configured to provide a first branch
of a MIMO signal and at least a second branch of the MIMO signal, the branches of the MIMO signal being in the same frequency
channel;

at least one master unit and a respective plurality of remote units coupled with the master unit, the at least one master
unit coupled with the MIMO signal source and configured for providing RF processing of the MIMO signals and for distributing
signals to one or more remote units;

at least another master unit and another respective plurality of remote units coupled with the another master unit, the another
master unit coupled with the MIMO signal and configured for providing RF processing of the MIMO signals and for distributing
signals to one or more remote units;

a hybrid coupler coupled to receive the first branch of the MIMO signal and the second branch of the MIMO signal on respective
first and second input ports and configured to provide output signals on first and second output ports, the output signal
on the first output port including at least a portion of the first branch of the MIMO signal and at least a portion of the
second branch of the MIMO signal that is phase shifted orthogonally in relation to the respective second branch of the MIMO
signal and the output signal on the second output port including at least a portion of the second branch of the MIMO signal
and at least a portion of the first branch of the MIMO signal that is phase shifted orthogonally in relation to the respective
first branch of the MIMO signal;

a first plurality of remote units with each remote unit configured for communicating the output signal of the first output
port of the hybrid coupler but not the output signal from the second output port from a single antenna coupled with a respective
remote unit, the output signal of the first output port including portions of both the first and second branches of the MIMO
signal;

a second plurality of remote units with each remote unit configured for communicating the output signal of the second output
port of the hybrid coupler but not the output signal of the first output port from a single antenna coupled with a respective
remote unit, the output signal of the second output port including portions of both the first and second branches of the MIMO
signal that are different from the output signal of the first output port;

the system configured for communicating both the output signal of the first output port and the output signal of the second
output port through the different plurality of remote units with respective single antennas to be used by a device for providing
MIMO communications.

US Pat. No. 10,056,998

SWITCHING SUB-SYSTEM FOR DISTRIBUTED ANTENNA SYSTEMS USING TIME DIVISION DUPLEXING

Andrew Wireless Systems G...

1. A method comprising:identifying, by a processor, a ratio between downlink sub-frames and uplink sub-frames for signals communicated via a distributed antenna system;
determining, by the processor, an initial clock setting that corresponds to the identified ratio and that controls a timing for generating switching signals that instruct at least one switch in an uplink path or the downlink path of the distributed antenna system to switch the distributed antenna system between an uplink mode and a downlink mode per the initial clock setting;
measuring a signal power in a downlink path of the distributed antenna system;
determining a switching time adjustment based on frame boundaries that correspond to the measured signal power; and
updating the initial clock setting based on the switching time adjustment.

US Pat. No. 9,973,255

REPEATER SYSTEM AND METHOD

Andrew Wireless Systems G...

1. A repeater system, comprising:a host unit configured to:
receive a plurality of downlink signals from multiple communication sources located outside of a coverage area and combine the plurality of downlink signals into a combined downlink signal for transmission to one or more remote units, and
receive a combined uplink signal from the one or more remote units and produce a plurality of uplink signals from the combined uplink signal for transmission to the multiple communication sources; and
the one or more remote units communicatively coupled to the host unit, the one or more remote units configured to:
receive the combined downlink signal from the host unit and modulate the combined downlink signal according to at least one modulation scheme to produce a downlink RF communication signal for transmission into a coverage area to a plurality of user terminals located within the coverage area, and
receive uplink RF communication signals, from the plurality of user terminals located within the coverage area, and demodulate the received uplink RF communication signals to produce the combined uplink signal from the uplink RF communication signal for transmission to the host unit; and
multiplex modulated signals produced from the combined downlink signal to form the downlink RF communication signal for transmission into the coverage area;
wherein a first of the plurality of user terminals communicates with a different one of the multiple communication sources than a second of the plurality of user terminals.

US Pat. No. 9,929,793

DIGITAL REPEATER HAVING BANDPASS FILTERING, ADAPTIVE PRE-EQUALIZATION AND SUPPRESSIN OF NATURAL OSCILLATION

Andrew Wireless Systems G...

1. A unit for repeating an input analog downstream radio frequency signal output by a base station, the unit comprising:a digital signal processor to digitally process first downstream digital samples derived from the input analog downstream radio frequency signal in order to generate output downstream digital samples, wherein the unit is located remotely from the base station;
a digital-to-analog converter; and
a power amplifier;
wherein the unit is configured to generate an amplified analog downstream radio frequency signal from the output downstream digital samples using, at least in part, the digital-to-analog converter and the power amplifier;
wherein the unit is configured to radiate an output analog downstream radio frequency signal from an antenna associated with the unit, wherein the antenna is located remotely from the base station and wherein the output analog downstream radio frequency signal is derived from the amplified analog downstream radio frequency signal;
wherein the output analog downstream radio frequency signal comprises a repeated version of the input analog downstream radio frequency signal;
wherein the unit further comprises:
an upstream signal path comprising a first analog-to-digital converter, wherein the upstream signal path is configured to generate upstream digital samples derived from an input analog upstream radio frequency signal using, at least in part, the first analog-to-digital converter; and
a feedback signal path comprising a second analog-to-digital converter, wherein the feedback signal path is configured to generate feedback digital samples derived from the amplified analog downstream radio frequency signal, wherein at least a portion of the feedback digital samples are input to the digital signal processor; and
wherein the digital signal processor is configured to perform digital distortion correction for the output downstream digital samples using the at least the portion of the feedback digital samples input to the digital signal processor.

US Pat. No. 9,641,131

ADAPTIVE SUPPLY VOLTAGE FOR A POWER AMPLIFIER

Andrew Wireless Systems G...

1. A signal-processing system for generating an amplified output signal based on an input signal, the system comprising:
an amplifier configured to generate the amplified output signal, wherein the amplifier is configured to receive a supply voltage;
switch circuitry configured to generate the supply voltage;
a software-based control unit configured to execute software to control the switch circuitry; and
hardware-interrupt circuitry configured to implement a hardware interrupt to control the switch circuitry, wherein the software-based
control unit and the hardware interrupt circuitry are connected to the switch circuitry in parallel such that the switch circuitry
is controllable (i) by the software-based control unit independent of the hardware-interrupt circuitry and (ii) by the hardware
interrupt circuitry independent of the software-based control unit.

US Pat. No. 10,455,510

INTERFACE DEVICE PROVIDING POWER MANAGEMENT AND LOAD TERMINATION IN DISTRIBUTED ANTENNA SYSTEM

Andrew Wireless Systems G...

1. An interface device for a distributed antenna system, the interface device comprising:a port configured to communicatively couple the interface device to a base station;
a switching component coupled to the port, wherein the switching component is switchable from a first configuration to a second configuration, the first configuration connecting the port to a downlink path from the interface device to the distributed antenna system, the second configuration connecting the port to a load;
a first power detector communicatively coupled to the port and configured to measure a signal power of an input signal provided via the port;
at least a second power detector communicatively coupled to the downlink path and configured to measure a signal power of a gain-adjusted signal traversing the downlink path; and
at least one switchable hybrid module in the downlink path.

US Pat. No. 10,355,753

HYBRID RAN/DIGITAL DAS REPEATER SYSTEM WITH ETHERNET TRANSPORT

Andrew Wireless Systems G...

1. A system comprising:an end node comprising one or more sink entities for a plurality of streams of digital samples, wherein the digital samples for the plurality of streams are indicative of one or more portions of wireless spectrum in which information is communicated in accordance with one or more wireless air interfaces; and
a boundary link optimization node;
wherein the end node and the boundary link optimizer node are communicatively coupled to an ETHERNET network;
wherein the end node is communicatively coupled to the ETHERNET network using a boundary link that is connected to an edge of the ETHERNET network; and
wherein the boundary link optimizer node is configured to:
receive ETHERNET packets that include data for the plurality of streams of digital samples;
extract the data for the plurality of streams from the received ETHERNET packets;
bundle the data for the streams of digital samples; and
communicate, to the end node over the boundary link, the bundled data for the streams of digital samples in ETHERNET packets.

US Pat. No. 10,200,881

RECONFIGURABLE SINGLE AND MULTI-SECTOR CELL SITE SYSTEM

Andrew Wireless Systems G...

1. A method, comprising:determining, by a phase correlation measurement unit, a rectified voltage signal of a combined signal formed from at least two downlink signals at a sectorized antenna sub-system of a cell site;
controlling a phase shifter at a radio frequency (RF) source of the cell site for phase shifting downlink signals based on a measured voltage of the rectified voltage signal, wherein the RF source of the cell site is located remotely from the sectorized antenna sub-system of the cell site; and
operating the sectorized antenna sub-system of the cell site as an omnidirectional antenna sub-system using at least two phase-aligned downlink signals.

US Pat. No. 9,906,319

SWITCHING SUB-SYSTEM FOR DISTRIBUTED ANTENNA SYSTEMS USING TIME DIVISION DUPLEXING

Andrew Wireless Systems G...

1. A method comprising:
identifying, by a processor, a ratio between downlink sub-frames and uplink sub-frames for signals communicated via a distributed
antenna system;

determining, by the processor, an initial clock setting that corresponds to the identified ratio and that controls a timing
for generating switching signals that instruct at least one switch in an uplink path or the downlink path of the distributed
antenna system to switch the distributed antenna system between an uplink mode and a downlink mode per the initial clock setting;

measuring a signal power in a downlink path of the distributed antenna system;
determining a switching time adjustment based on frame boundaries that correspond to the measured signal power; and
updating the initial clock setting based on the switching time adjustment.

US Pat. No. 9,917,622

HYBRID RAN/DIGITAL DAS REPEATER SYSTEM WITH ETHERNET TRANSPORT

Andrew Wireless Systems G...

1. A system comprising:
an end node comprising one or more sink entities for a plurality of streams of digital samples, wherein the digital samples
for the plurality of streams are indicative of one or more portions of wireless spectrum in which information is communicated
in accordance with one or more wireless air interfaces; and

a boundary link optimization node;
wherein the end node and the boundary link optimizer node are communicatively coupled to an ETHERNET network;
wherein the end node is communicatively coupled to the ETHERNET network using a boundary link that is connected to an edge
of the ETHERNET network;

wherein a virtual local area network (VLAN) is established in the ETHERNET network that includes: a first end point at the
edge of the ETHERNET network to which the boundary link is connected and a second end point at the boundary link optimizer
node; and

wherein the boundary link optimizer node is configured to:
receive ETHERNET packets that include data for the plurality of streams of digital samples;
extract the data for the plurality of streams from the received ETHERNET packets;
bundle the data for the streams of digital samples; and
communicate, to the end node over the VLAN, the bundled data for the streams of digital samples in ETHERNET packets.

US Pat. No. 10,212,018

MODULE FOR COMBINING SIGNALS HAVING DIFFERENT FREQUENCIES

Andrew Wireless Systems G...

1. A telecommunications system, comprising:input ports configured to receive signals at different frequencies;
at least one output port configured to output the signals; and
a frequency combiner communicatively coupled between the input ports and the at least one output port, the frequency combiner having a plurality of RF modules communicatively coupled to the input ports, each of the plurality of RF modules comprising a detector with circuitry for determining differences in power level between input signals to the frequency combiner and output signals from the frequency combiner, the frequency combiner having adjustable tuning elements, each adjustable tuning element being configured to adjust a signal-processing parameter of the frequency combiner while the frequency combiner is in the telecommunications system.

US Pat. No. 9,864,884

SYSTEM FOR CHARACTERIZING A PASSIVE ANTENNA NETWORK AND ELEMENTS IN A DISTRIBUTED ANTENNA SYSTEM

Andrew Wireless Systems G...

1. A distributed antenna system comprising:
a plurality of remote antenna units, a first passive element coupled to at least one of the remote antenna units at a connection
juncture;

an RFID system associated with the first passive element and having RFID data identifying the first passive element;
an interrogator unit associated with the remote antenna unit, the interrogator unit configured to generate a least one signal
for transmission to the passive element to be reflected at the connection juncture and received at the interrogator unit;

the interrogator unit configured to generate at least one signal for transmission to the RFID system to obtain the RFID data
identifying the passive element;

processing circuitry configured to process the reflected signal and to measure a parameter of the first passive element, the
processing circuitry further configured to correlate the measured parameter with the RFID data for the passive element.

US Pat. No. 10,181,911

CONFIGURATION SUB-SYSTEM FOR TELECOMMUNICATION SYSTEMS

Andrew Wireless Systems G...

1. A configuration sub-system comprising:an input communicatively coupleable to a base station;
a test signal generator integrated into the configuration sub-system, wherein the configuration sub-system is configured to switch between a first mode and a second mode, wherein in the first mode the configuration sub-system is configured to provide a test signal generated by the test signal generator to a downlink path, wherein in the second mode the configuration sub-system is configured to provide an RF downlink signal that is received via the input from the base station to the downlink path and deactivate the test signal generator, wherein the configuration sub-system is configured to provide the RF downlink signal to the downlink path only in the second mode;
a power measurement device integrated into the configuration sub-system, the power measurement device being configured to:
measure a test signal power of the test signal at a measurement point in the downlink path, and
measure a downlink signal power of the RF downlink signal at the measurement point; and
a controller configured to normalize signals transmitted using a distributed antenna system via the configuration sub-system by adjusting a downlink path gain for the downlink path based on the test signal power measured by the power measurement device, wherein the distributed antenna system is configured to transmit the RF downlink signal using the downlink path gain as adjusted by the controller.

US Pat. No. 10,374,697

DISTRIBUTED DUPLEXER CONFIGURATION FOR BLOCKING AND LINEARITY

Andrew Wireless Systems G...

1. A remote unit, comprising:a duplexer couplable between (i) a common port and (ii) a receive path and a transmit path, the common port couplable to an antenna for transmitting downlink signals and receiving uplink signals, wherein the duplexer has relaxed isolation characteristics for transmitted downlink signals in the receive path, wherein the duplexer allows at least some transmitted downlink signals to traverse the receive path;
a first band-pass filter between a first amplifier and a second amplifier, the first amplifier and the second amplifier forming a low-noise amplifier in the receive path; and
a second band-pass filter in the receive path, wherein the second amplifier is positioned between the first band-pass filter and the second band-pass filter;
wherein the first band-pass filter and the second band-pass filter are configured to pass uplink signals in a frequency range of the receive path.

US Pat. No. 10,271,380

SCALABLE TELECOMMUNICATIONS SYSTEM

Andrew Wireless Systems G...

1. A node unit for a scalable telecommunications system, the node unit comprising:a plurality of universal digital radio frequency (RF) transceivers, wherein each of the plurality of universal digital RF transceivers is configured to communicatively couple the node unit to a respective external equipment;
one or more universal digital transport interfaces, wherein each of the one or more universal digital transport interfaces is configured to communicatively couple the node unit to a respective transport link;
a universal backplane communicatively coupled to the plurality of universal digital RF transceivers and to the one or more universal digital transport interfaces; and
a system controller;
wherein each of the plurality of universal digital RF transceivers is configured to couple to a respective modular power amplifier and a respective modular duplexer inserted within the node unit; and
wherein the system controller is configured to detect capabilities of at least one of the universal digital RF transceivers, the universal digital transport interfaces, the universal backplane, the respective modular power amplifier and the respective modular duplexer, and adjust parameters of the node unit in response to the detected capabilities.

US Pat. No. 10,461,839

DIGITAL REPEATER SYSTEM

Andrew Wireless Systems G...

1. A digital repeater system for repeating RF signals, the digital repeater system comprising:a receiving section comprising an analog-to-digital converter, the receiving section configured for receiving an RF input signal that includes at least one frequency band having at least one subband associated with at least one communication channel of a telecommunications network, the receiving section being configured to digitize the RF input signal to obtain a digital signal;
a filter device comprising at least one digital filter having a passband for digitally filtering the digital signal, the at least one digital filter being configurable by setting filter coefficients;
a gain control device configurable to set a gain of at least a portion of the digital signal;
at least one transmitting section comprising a digital-to-analog converter, the at least one transmitting section configured for transmitting an RF output signal and for converting the digital signal to the RF output signal for transmission; and
a control unit adapted to configure the filter coefficients of the at least one digital filter in response to a change in the gain setting of the gain control device, wherein the filter coefficients are configured based on the change in the gain setting to optimize group delay.

US Pat. No. 10,382,847

SYSTEMS AND METHODS FOR COMMUNICATING SIGNALING OVER AN OPTICAL DISTRIBUTED ANTENNA SYSTEM

Andrew Wireless Systems G...

1. A distributed antenna system, the system comprising:a master unit configured to receive a base station downlink radio frequency signal and to transmit a base station uplink radio frequency signal; and
at least one remote antenna unit that is communicatively coupled to the master unit using at least one cable, the remote antenna unit configured to radiate a remote downlink radio frequency signal from at least one antenna associated with the remote antenna unit and to receive a remote uplink radio frequency signal from at least one antenna associated with the remote antenna unit;
wherein the master unit comprises:
a master unit controller; and
a respective interface to couple the master unit controller to a first operator control panel;
wherein the at least one remote antenna unit comprises:
a remote unit controller; and
a respective interface to couple the remote unit controller to a second operator control panel;
wherein the master unit controller and the remote unit controller synchronize at least some information between the first operator control panel and the second operator control panel over the at least one cable.

US Pat. No. 10,367,572

REPEATER SYSTEM AND METHOD

Andrew Wireless Systems G...

1. A repeater system, comprising:a host unit configured to:
receive a plurality of downlink signals from multiple communication sources located outside of a coverage area and combine the plurality of downlink signals into a combined downlink signal for transmission to one or more remote units, and
receive a combined uplink signal from the one or more remote units and produce a plurality of uplink signals from the combined uplink signal for transmission to the multiple communication sources; and
the one or more remote units communicatively coupled to the host unit, the one or more remote units configured to:
receive the combined downlink signal from the host unit and modulate the combined downlink signal according to at least one modulation scheme to produce a downlink RF communication signal for transmission into a coverage area to a plurality of user terminals located within the coverage area, and
receive uplink RF communication signals, from the plurality of user terminals located within the coverage area, and demodulate the received uplink RF communication signals to produce the combined uplink signal from the uplink RF communication signal for transmission to the host unit; and
multiplex modulated signals produced from the combined downlink signal to form the downlink RF communication signal for transmission into the coverage area;
wherein a first of the plurality of user terminals communicates with a different one of the multiple communication sources than a second of the plurality of user terminals.

US Pat. No. 10,715,220

MULTIPLE INPUT MULTIPLE OUTPUT DISTRIBUTED ANTENNA SYSTEM ARCHITECTURES

Andrew Wireless Systems G...

1. A multiple input and multiple output telecommunications system, comprising:a head-end unit communicatively coupled to a base station; and
a remote antenna unit communicatively coupled to the head-end unit and located remotely from the head-end unit;
wherein the head-end unit comprises:
a plurality of downlink signal paths;
a first plurality of mixers located in the plurality of downlink signal paths, the first plurality of mixers being coupled to first oscillators and configured to produce a plurality of downlink signals occupying non-overlapping frequency bands and representative of wireless signals;
a first summer coupled to the plurality of downlink signal paths and configured to sum the plurality of downlink signals to form summed downlink signals; and
a first shared analog-to-digital converter configured to convert the summed downlink signals to digital downlink signals;
wherein the remote antenna unit is configured to provide downlink signals based on the digital downlink signals to one or more terminal devices.

US Pat. No. 10,651,893

TDD REPEATER FOR A WIRELESS NETWORK AND METHOD FOR OPERATING SAID REPEATER

Andrew Wireless Systems G...

1. A time-division duplex (TDD) repeater system, the system comprising:a master unit comprising an uplink signal path and a separate downlink signal path defined therein, the master unit configured to couple in an uplink direction to a base station, the master unit configured to couple in a downlink direction to at least one remote antenna unit, wherein the uplink signal path communicates uplink communication signals in the upstream direction received from the at least one remote antenna unit to the base station, wherein the downlink signal path communicates downlink communication signals in the downstream direction received from the base station to the at least one remote antenna unit;
at least one switch configured to change direction of signal transmissions within the master unit between the uplink communication signals transmitted through the uplink signal path and the downlink communication signals transmitted through downlink signal path;
a synchronizing unit within the master unit is configured to receive via the downlink signal path a clock signal from the downlink communication signals received in the downstream direction from the base station, wherein the synchronizing unit supplies a control signal to the at least one switch corresponding to the clock signal;
wherein the switch swaps the direction of signal transmissions within the master unit between the uplink communication signals and the downlink communication signals in response to the control signal.

US Pat. No. 10,554,245

TRANSMIT AND RECEIVE COMBINING USING CIRCULATOR WITH DISTORTION CANCELLATION

Andrew Wireless Systems G...

1. A telecommunications system, comprising:a circulator device couplable between (i) an antenna and (ii) a transmit path and a receive path, the antenna positionable in the telecommunications system to transmit downlink signals and receive uplink signals;
directional couplers couplable to the antenna and configured to generate samples of a transmit signal subsequent to the transmit signal being routed to the antenna by the circulator device;
a correction circuit couplable to the directional couplers, wherein the correction circuit is configured to correct imperfections in the samples due to finite directivity of the directional couplers and output a corrected transmit signal;
an adaptive filter coupled to the correction circuit, wherein the adaptive filter is configured to generate an output signal by adjusting a level and a phase of the corrected transmit signal; and
a summer device in the receive path, wherein the summer device is configured to sum the output signal with a receive signal in the receive path to reduce distortion of the receive signal by the transmit signal.

US Pat. No. 10,454,510

CREST FACTOR OPTIMIZATION IN A DIGITAL REPEATER SYSTEM

Andrew Wireless Systems G...

1. An optimization system for use in a digital repeater system, comprising:at least one input port for receiving a carrier signal associated with a communication channel of a telecommunication network,
at least one meter unit for obtaining an estimate of an error vector magnitude for the carrier signal, and
at least one crest factor reduction unit for dynamically reducing, based on the estimate of the error vector magnitude, the crest factor of the carrier signal,
wherein the at least one crest factor reduction unit is constituted to add an inverse peaking signal to the carrier signal to cancel a detected peak, wherein the inverse peaking signal is shaped such that a noise energy of the inverse peaking signal falls into a frequency band associated with the carrier signal.

US Pat. No. 10,284,292

SYSTEMS AND METHODS FOR COMMUNICATION LINK REDUNDANCY FOR DISTRIBUTED ANTENNA SYSTEMS

Andrew Wireless Systems G...

1. A distributed antenna system, the system comprising:at least one master unit configured to receive a base station downlink radio frequency signal and to transmit a base station uplink radio frequency signal;
at least one remote antenna unit that is communicatively coupled via a switch to the at least one master unit by a primary cable and a secondary cable both coupled to the switch, the remote antenna unit comprising a power amplifier and configured to radiate a remote downlink radio frequency signal from at least one antenna associated with the remote antenna unit, the remote antenna unit further configured to receive a remote uplink radio frequency signal from at least one antenna associated with the remote antenna unit; and
a compensating link check module that outputs a control signal to the switch, wherein the switch selects between the primary cable and the secondary cable in response to the control signal;
wherein the compensating link check module is configured to control the switch to momentarily select the secondary cable to perform a link check of the secondary cable, wherein during the link check of the secondary cable the remote unit measures at least one quality metric of a downlink signal received from the at least one master unit via the secondary cable; and
wherein upon initiation of the link check of the secondary cable, the compensating link check module adjusts an attenuation of the downlink signal received on the secondary cable by loading a set of calibration settings for the secondary cable into a downlink compensation attenuator.

US Pat. No. 10,644,761

DISTRIBUTED ANTENNA SYSTEM FOR MIMO COMMUNICATIONS

Andrew Wireless Systems G...

1. A method for determining placement of a plurality of simulated antennas of a simulated distributed antenna system for handling simulated MIMO signals in a simulated environment comprising:at a first simulated location within the simulated environment, simulating communication of a first simulated MIMO signal by a first remote unit over a first simulated air interface in the simulated environment;
at a second simulated location within the simulated environment, simulating communication of a second simulated MIMO signal by a second remote unit over a second simulated air interface in the simulated environment;
the first simulated location and the second simulated location arranged within the simulated environment to provide overlapping simulated signal coverage of both the first simulated MIMO signal and the second simulated MIMO signal at a third simulated location in the simulated environment; and
analyzing at least a first simulated received power of the first simulated MIMO signal and a second simulated received power of the second simulated MIMO signal at the third simulated location in the simulated environment.

US Pat. No. 10,601,505

SYSTEMS AND METHODS FOR COMMUNICATION LINK REDUNDANCY FOR DISTRIBUTED ANTENNA SYSTEMS

Andrew Wireless Systems G...

1. A link redundancy verification system for a communication system, the system comprising:a switch configured to switch between a first cable and a second cable
a compensating link check circuit that outputs a control signal to the switch, wherein the switch selects between the first cable and the second cable in response to the control signal;
wherein the compensating link check circuit is configured to control the switch to momentarily select the second cable to perform a link check of the second cable, wherein during the link check of the second cable at least one quality metric of a signal transported via the second cable is measured; and
wherein upon initiation of the link check of the second cable, the compensating link check circuit adjusts an attenuation of the signal received on the second cable based on a set of calibration setting for the second cable.

US Pat. No. 10,499,388

SMALL CELL NETWORK ARCHITECTURE FOR SERVICING MULTIPLE NETWORK OPERATORS

Andrew Wireless Systems G...

1. A management sub-system for managing a small cell network servicing a plurality of network operators the system comprising:a controller in communication with a plurality of core networks, wherein each of the plurality of core networks is operated by a separate network operator providing telecommunication services to terminal devices; and
a plurality of baseband processing units in communication with the controller, wherein each of the plurality of baseband processing units is configured to process data from at least one respective core network of the plurality of core networks for distribution via a plurality of remote antenna units of the small cell network;
wherein the plurality of remote antenna units are remotely located from the plurality of baseband processing units;
wherein at least one of the plurality of remote antenna units is remotely located from at least one other remote antenna unit;
wherein the management sub-system is configured for providing a respective amount of capacity via the small cell network for each core network of the plurality of core networks based on a respective subset of the plurality of baseband processing units assigned to the core network; and
wherein the controller is configured to provide, independently for each network operator, (a) small cell and macro cell handover management and (b) small cell and macro cell interference management.

US Pat. No. 10,498,430

EXPAND DYNAMIC OF TDD SIGNAL DETECTION AND EXPAND ROBUSTNESS AGAINST VOLATILE SIGNALS

Andrew Wireless Systems G...

1. A method for determining threshold signal power for a switching control module of a time-division-duplexing (TDD) switching sub-system comprising:setting a threshold signal power to a first value, wherein the threshold signal power is compared to a measured signal power of a downlink signal of a downlink path of a telecommunication system from a measurement receiver;
determining a first downlink signal time using the first value;
adjusting the threshold signal power to a second value;
determining a second downlink signal time using the second value;
determining a difference between the first downlink signal time and the second downlink signal time;
when the difference between the first downlink signal time and the second downlink signal time does not exceed a predetermined threshold time, determining whether the second downlink signal time corresponds to a valid downlink signal time;
when the second downlink signal time corresponds to a valid downlink signal time, setting a fixed threshold signal power for use during online operation of the switching control module.

US Pat. No. 10,419,100

DOPPLER SHIFT CORRECTION SUB-SYSTEM FOR COMMUNICATION DEVICE

Andrew Wireless Systems G...

1. A repeater comprising:a processor configured to determine a corrective frequency shift for a signal received from a source device by:
determining a representative transmission frequency by determining a channel associated with the signal and identifying the representative transmission frequency associated with the channel;
determining a relative velocity of the repeater to the source device by:
determining an identifier, identifying the source device, in the signal;
retrieving a geographic location of the source device from a computer readable medium based on the identifier; and
determining the relative velocity based on the geographic location of the source device and a geographic location of the repeater; and
determining the corrective frequency shift for the signal, without measuring a frequency shift of the signal, by multiplying the relative velocity by the representative transmission frequency and dividing the product by a propagation speed of the signal;
a frequency-shifting module in communication with the processor, the frequency-shifting module being configured to shift the signal using the corrective frequency shift prior to wirelessly transmitting the shifted signal to a destination device, wherein the destination device is different from the source device;
wherein the processor is further configured to:
identify a destination, amongst a plurality of source devices, to which an uplink signal is to be transmitted; and
determine a compensating frequency shift for the uplink signal based on an uplink transmission frequency and a velocity of the repeater relative to a geographic location of the destination;
wherein the frequency-shifting module is further configured to shift the uplink signal using the compensating frequency shift prior to transmitting the uplink signal to the destination.

US Pat. No. 10,419,134

CONFIGURATION SUB-SYSTEM FOR TELECOMMUNICATION SYSTEMS

Andrew Wireless Systems G...

1. A configuration sub-system comprising:an input communicatively coupleable to a base station;
a test signal generator integrated into the configuration sub-system, wherein the configuration sub-system is configured to switch between a first mode and a second mode, wherein in the first mode the configuration sub-system is configured to provide a test signal generated by the test signal generator to a downlink path, wherein in the second mode the configuration sub-system is configured to provide an RF downlink signal that is received via the input from the base station to the downlink path and deactivate the test signal generator, wherein the configuration sub-system is configured to provide the RF downlink signal to the downlink path only in the second mode;
a power measurement device integrated into the configuration sub-system, the power measurement device being configured to:
measure a test signal power of the test signal at a measurement point in the downlink path, and
measure a downlink signal power of the RF downlink signal at the measurement point; and
a controller configured to normalize signals transmitted using a distributed antenna system via the configuration sub-system by adjusting a downlink path gain for the downlink path, wherein the distributed antenna system is configured to transmit the RF downlink signal using the downlink path gain as adjusted by the controller.

US Pat. No. 10,341,880

TELECOMMUNICATION SYSTEMS WITH DISTRIBUTED BASE STATION FUNCTIONALITY

Andrew Wireless Systems G...

1. A telecommunication system that is remotely located from an external base-station entity, base-station component, or core-network entity, the telecommunication system, comprising:an interface with circuitry configured to communicate with the external base-station entity, base-station component, or core-network entity;
a plurality of spatially separated radio units that are communicatively coupled to the interface via an aggregation unit, wherein the radio units are positionable in an area for providing wireless coverage to terminal devices;
the aggregation unit communicatively coupleable between the interface and the plurality of radio units; and
a low-layer processing module in at least one of the aggregation unit or a radio unit of the plurality of radio units, the low-layer processing module configured to perform physical layer processing that is split between uplink physical layer processing and downlink physical layer processing.

US Pat. No. 10,700,754

DISTRIBUTED ANTENNA SYSTEM FOR MIMO SIGNALS

Andrew Wireless Systems G...

1. A distributed antenna system comprising:at least one master unit;
a plurality of remote units communicatively coupled with the at least one master unit and distributed to provide coverage within a service area, each of the plurality of remote units remotely located from the at least one master unit and other remote units of the plurality of remote units;
a coupler element coupled to receive a plurality of multiple-input and multiple-output (MIMO) signals, the plurality of MIMO signals including at least a first MIMO signal and a second MIMO signal, the coupler element configured to:
introduce a phase shift in a first portion of the first MIMO signal to generate a first phase shifted portion of the first MIMO signal;
combine the first phase shifted portion with a second portion of the second MIMO signal to generate a combined MIMO signal; and
present the combined MIMO signal at a first output port of the coupler element;
at least one antenna coupled with each of the plurality of remote units and configured to receive the combined MIMO signal for transmission.

US Pat. No. 10,644,742

NON-DUPLEXER ARCHITECTURES FOR TELECOMMUNICATIONS SYSTEM

Andrew Wireless Systems G...

1. A telecommunications system, comprising:an uplink communication path configured for communicatively coupling uplink signals from an antenna to a base station; and
a downlink communication path configured for communicatively coupling downlink signals to the antenna from the base station, the uplink communication path and downlink path both being configured to communicatively couple to the antenna using a non-duplexer coupling device; and
an active mitigation subsystem that includes one or more analog-to-digital converters in the uplink communication path and in the downlink communication path, the one or more analog-to-digital converters in the downlink communication path having a dynamic range and bandwidth sufficient to directly sample incoming RF signals from the base station, the one or more analog-to-digital converters in the uplink communication path having a dynamic range and bandwidth sufficient to directly sample incoming RF signals received by the antenna,
wherein the active mitigation subsystem is configured to isolate the uplink signals traversing the uplink communication path from the downlink signals traversing the downlink communication path independent of using a duplexer.

US Pat. No. 10,461,838

REPEATER AND METHOD FOR OPERATING SUCH A REPEATER

Andrew Wireless Systems G...

1. A telecommunications system, comprising:a master unit;
remote units;
wherein the remote units are configured to communicate with mobile radio terminals and to communicate with the master unit, where at least one of the remote units including a sensor and a control circuit, the sensor being configured to detect a parameter about a coverage environment, the control circuit being configured to cause the at least one of the remote units to switch between a passive operating state and an active operating state based on the parameter; and
wherein the at least one of the remote units transmits signals wirelessly at a higher power in the active operating state as compared to the passive operating state, wherein the control circuit is further configured to cause the at least one of the remote units to switch between the passive operating state and the active operating state at a rate that maintains a transmission of downlink signals by the at least one of the remote units.

US Pat. No. 10,412,595

CAPACITY OPTIMIZATION SUB-SYSTEM FOR DISTRIBUTED ANTENNA SYSTEM

Andrew Wireless Systems G...

1. A capacity optimization sub-system for distributing capacity in a distributed antenna system, the capacity optimization sub-system comprising:a switch matrix having a plurality of switches, the switch matrix configured to receive a plurality of sectors from a plurality of base stations and to route the plurality of sectors to a plurality of coverage zones, wherein the switch matrix is communicatively coupled to a plurality of remote antenna units providing service to the plurality of coverage zones;
wherein the switch matrix is configured to enable one or more switches of the plurality of switches to be adjusted, wherein adjusting the one or more switches of the plurality of switches redistributes capacity of at least one base station of the plurality of base stations among the plurality of coverage zones;
wherein the capacity optimization sub-system is configured to be operated in a manual control mode.

US Pat. No. 10,715,297

SELECTABLE BAND SUPPRESSION FOR A DISTRIBUTED ANTENNA SYSTEM

Andrew Wireless Systems G...

1. A distributed antenna system, the system comprising:at least one master unit configured to receive a base station downlink radio frequency signal and to transmit a base station uplink radio frequency signal;
at least one remote antenna unit that is communicatively coupled to the at least one master unit, the remote antenna unit comprising a power amplifier and configured to radiate a remote downlink radio frequency signal from at least one antenna associated with the remote antenna unit, the remote antenna unit further configured to receive a remote uplink radio frequency signal from at least one antenna associated with the remote antenna unit, wherein the remote downlink radio frequency signal comprises a first downlink frequency band and a second downlink frequency band and wherein the remote uplink radio frequency signal comprises a first uplink frequency band and a second uplink frequency band;
a band suppression module comprising:
a band suppression controller;
an uplink band suppression electronics circuit controlled by the band suppression controller, wherein the uplink band suppression electronics circuit is controlled by the band suppression controller to pass uplink signals in both the first uplink frequency band and the second uplink frequency band while in a first state, wherein in a second state the uplink band suppression electronics circuit is controlled by the band suppression controller apply an attenuation to suppress the first uplink frequency band in response to a signal from the band suppression controller while passing the second uplink frequency band; and
a downlink band suppression electronics circuit controlled by the band suppression controller, wherein the downlink radio frequency band suppression electronics circuit is controlled by the band suppression controller to pass downlink signals in both a first downlink frequency band and a second downlink frequency band while in the first state, wherein in the second state the downlink band suppression electronics circuit is configured to apply an attenuation to suppress the first downlink frequency band in response to the signal from the band suppression controller while passing the second downlink frequency band.

US Pat. No. 10,313,030

CONFIGURATION SUB-SYSTEM FOR TELECOMMUNICATION SYSTEMS

Andrew Wireless Systems G...

1. A configuration sub-system comprising:an input communicatively coupleable to a base station;
a test signal generator integrated into the configuration sub-system, wherein the configuration sub-system is configured to switch between a first mode and a second mode, wherein in the first mode the configuration sub-system is configured to provide a test signal generated by the test signal generator to a downlink path, wherein in the second mode the configuration sub-system is configured to provide an RF downlink signal that is received via the input from the base station to the downlink path and deactivate the test signal generator, wherein the configuration sub-system is configured to provide the RF downlink signal to the downlink path only in the second mode;
a power measurement device integrated into the configuration sub-system, the power measurement device being configured to:
measure a test signal power of the test signal at a measurement point in the downlink path, and
measure a downlink signal power of the RF downlink signal at the measurement point; and
a controller configured to normalize signals transmitted using a distributed antenna system via the configuration sub-system by adjusting a downlink path gain for the downlink path based on the test signal power measured by the power measurement device, wherein the distributed antenna system is configured to transmit the RF downlink signal using the downlink path gain as adjusted by the controller.

US Pat. No. 10,531,330

FRAME START OPTIMIZING IN TELECOMMUNICATIONS SYSTEMS

Andrew Wireless Systems G...

1. A method comprising:receiving, by an aggregation device in a telecommunication system, a first plurality of frames from a plurality of transmitter devices;
determining that buffering is required for at least some frames of the first plurality of frames to sequence the first plurality of frames for a first aggregation operation performed by the aggregation device, wherein the first aggregation operation comprises a process that combines frames from transmitter devices; and
in response to determining that the buffering is required, transmitting frame adjustment signals to the plurality of transmitter devices, wherein the frame adjustment signals instruct the plurality of transmitter devices to transmit subsequent frames such that the buffering is reduced for a subsequent aggregation operation performed by the aggregation device using the subsequent frames, wherein the frame adjustment signals include commands that are based on the buffering required for the at least some frames of the first plurality of frames.

US Pat. No. 10,523,346

SYSTEM FOR DETERMINING THE LAYOUT AND ABSOLUTE AND RELATIVE POSITIONS OF ELEMENTS IN A DISTRIBUTED ANTENNA SYSTEM AND FOR USE OF THOSE ELEMENTS FOR MEASUREMENT

Andrew Wireless Systems G...

1. A distributed antenna system comprising:a plurality of remote antenna units, a passive element coupled to at least one of the remote antenna units;
an RFID system located proximate the passive element; and
wherein the RFID system includes processing circuitry and measurement circuitry, the processing circuitry configured for receiving an interrogation signal coupled onto a cable of the distributed antenna system, and processing the interrogation signal and providing a response, the response including data associated with a Radio Frequency (RF) signal parameter of the interrogation signal measurement made by the measurement circuitry.

US Pat. No. 10,320,468

REPEATER SYSTEM FOR USE ON A MOVEABLE OBJECT

Andrew Wireless Systems G...

1. A repeater system comprising:a master unit positioned at a first location on a movable object, the master unit configured to communicatively couple to antennas for receiving a downlink RF signal from at least one base station external to the movable object and for transmitting an uplink RF signal towards the at least one base station; and
a plurality of remote units each configured to couple through a transport medium to the master unit by a connection, the plurality of remote units each positioned on the movable object and associated with different coverage areas within the movable object, the plurality of remote units each configured to couple to a respective antenna system for transmitting the downlink RF signal into respective coverage areas of the movable object and for receiving the uplink RF signal from the coverage areas,
a control unit, wherein, for at least a subgroup of the plurality of remote units, a gain for each remote unit is dynamically adjusted in a time-offset fashion by the control unit to trigger handovers between overlapping base-station cells in a time-offset manner.

US Pat. No. 11,032,726

OPTIMIZATION SYSTEM FOR DISTRIBUTED ANTENNA SYSTEM

Andrew Wireless Systems G...

1. A mobile testing system for optimizing wireless coverage in a distributed antenna system, the mobile testing system comprising:a measurement receiver configured to determine a plurality of signal levels for a plurality of signals received by the measurement receiver after being wirelessly communicated from the distributed antenna system; and
processing circuitry communicatively coupled to the measurement receiver and configured to:
identify a subset of signals from the plurality of signals by decoding a respective identifier encoded in each of the subset of signals, wherein the respective identifier identifies that the subset of signals is targeted to at least one coverage zone in which the mobile testing system is located,
obtain, from the measurement receiver, a subset of signal levels from the plurality of signal levels, wherein the subset of signal levels corresponds to the subset of signals,
generate coverage contour data describing signal coverage throughout the at least one coverage zone, wherein the coverage contour data is generated based on the subset of signal levels,
determine at least one modification to at least one remote unit of the distributed antenna system based on the coverage contour data,
generate control information specifying the at least one modification, wherein the control information comprises at least one control signal, and
modify at least one of an antenna orientation and a beamforming pattern of the at least one remote unit by causing the at least one control signal to be transmitted to the at least one remote unit.

US Pat. No. 10,886,964

NON-DUPLEXER ARCHITECTURES FOR TELECOMMUNICATIONS SYSTEM

Andrew Wireless Systems G...

1. A remote antenna unit, the remote unit comprising:a downlink communication path and an uplink communication path;
a coupling device coupled to the downlink communication path and the uplink communication path, the coupling device configured to couple the downlink communication path and the uplink communication path to an antenna, wherein the coupling device does not utilize a duplexer to isolate the downlink communication path from the uplink communication path;
an active mitigation subsystem comprising:
one or more high dynamic range analog-to-digital converters positioned in the uplink communication path;
a filter;
wherein the active mitigation subsystem inputs a downlink reference signal from the downlink communication path and the filter generates a downlink mitigation signal from the downlink reference signal, wherein the active mitigation subsystem output the downlink mitigation signal onto the uplink communication path.

US Pat. No. 11,032,054

SEQUENCED TRANSMIT MUTING FOR WIDEBAND POWER AMPLIFIERS

Andrew Wireless Systems G...

1. A sequenced transmit muting wideband power amplifier, the power amplifier comprising:at least one pre-driver stage including a transmit radio frequency (RF) input and at least a first pre-driver and a second pre-driver;
a mute switch configured to selectively establish a communication path between the first and second pre-drivers and couple the second pre-driver to a termination resistor;
at least one pre-driver switch to selectively couple a supply voltage and ground to the first and second pre-drivers;
a driver stage in communication with the at least one pre-driver stage, the driver stage including at least one first driver;
a final amplifier stage including a transmit RF output and at least one second driver;
at least one slow negative-bias-switching (S-NBS) switch configured to selectively couple one of a first voltage and a second voltage to the at least one first driver and at least one second driver; and
at least one controller configured to activate the at least one pre-driver switch, the mute switch, the at least one S-NBS switch to selectively place the amplifier in one of a transmit mode and a mute mode.

US Pat. No. 10,735,084

REDUNDANT WIRELESS COMMUNICATION SYSTEMS AND METHODS TO ENSURE RADIO SERVICE QUALITY UNDER ABNORMAL CONDITIONS

Andrew Wireless Systems G...

1. A repeater with redundancy functions for a wireless communication system, the repeater comprising:downlink repeater circuitry to interface communications from base stations to user equipment;
uplink repeater circuitry to interface communications from the user equipment to the base stations;
a detection function configured to detect conditions of communications between the base stations and the repeater;
at least one memory to store a primary configuration that sets out parameters for interfacing communications between the repeater and a primary base station of the base stations and at least one secondary configuration that sets out parameters for interfacing communications between the repeater and at least one secondary base station of the base stations, wherein the parameters include a first frequency and first gain used for interfacing communications between the repeater and the primary base station and a second different frequency and second gain used for interfacing communications between the repeater and the secondary base station; and
a controller configured to implement the at least one secondary configuration to communicate with an associated secondary base station upon the detection function detecting abnormal communications between the repeater and the primary base station.

US Pat. No. 11,071,079

SYNCHRONIZING MULTIPLE-INPUT/MULTIPLE-OUTPUT SIGNALS IN DISTRIBUTED ANTENNA SYSTEMS

Andrew Wireless Systems G...


1. A method comprising:transmitting signals between a head-end unit and remote units of a telecommunication system;
determining that a first delay of a signal path between the head-end unit and a first remote unit of the remote units is greater than each delay of signal paths between the headend unit and other remote units;
determining if a difference of the first delay from delays in other signal paths is greater than a threshold;
configuring, based on the first delay when the difference between the first delay from the delays in the other signal paths is not greater than the threshold and based on another delay when the difference between the first delay from the delays in the other signal paths is greater than the threshold, the telecommunication system to delay transmission of additional signals such that the additional signals are simultaneously transmitted to another unit by either the head-end unit or the remote units;
wherein the signals comprise Ethernet-framed data representing a set of multiple-input/multiple-output signals;
further wherein determining the first delay is greater than the delay of signal paths between the head-end unit and other remote units includes:setting a real-time clock for the head-end unit and the remote units;
for each remote unit of the remote units:
transmitting between the head-end unit and the remote unit a message comprising an instruction to transmit a responsive message at a first time,
identifying a second time at which the responsive message is received by the head-end unit or the remote unit,
determining a delay from a difference between the first time and the second time; and
identifying a greatest delay among the remote units.


US Pat. No. 10,823,210

SELF-LOCKING FRONT PANEL

Andrew Wireless Systems G...

1. A self-locking front panel for a component rack, the self-locking front panel comprising:a base plate having a front side and an opposably positioned back side, the base plate further having a first end edge and an opposably positioned second end edge;
a first retaining member extending from the back side of the base plate, the first retaining member terminating in a first retaining portion, the first retaining portion extending out beyond an edge of the first retaining member, the first retaining portion of the first retaining member configured to be held within a first retaining groove of a first retaining rail of a housing of a component rack;
a second retaining member extending from the back side of the base plate a select distance from the first retaining member, the second retaining member terminating in a second retaining portion, the second retaining portion extending out beyond an edge of second retaining member, the second retaining portion of the second retaining member configured to be held within a second retaining groove of a second retaining rail of the housing of the component rack to selectively couple the self-locking front panel to the component rack;
at least one guide tab extending from the back side of the base plate configured to guide the self-locking front panel to a desired position in relation to the component rack when covering at least one component bay, the at least one guide tab being an elongated member extending proximately between a first side edge to a second side edge of the base plate in a parallel fashion with at least one of the first and second retaining members and positioned between an end edge of the base plate and the associated one of the first and second retaining members, the at least one guide tab configured to be received in an associated guide holding slot of an associated one of the first and second retaining rails of the housing such that a finger portion of the associated one of the first and second retaining rail is positioned between the at least one guide tab and an associated one of the first and second retaining member that engages the finger portion of the associated one of the first and second retaining rail when the self-locking front panel is coupled to the housing; and
at least the first and second retaining members being made of a resilient material that flexes under a load and returns to an original position when the load is removed.

US Pat. No. 10,887,010

SYSTEMS AND METHODS FOR COMMUNICATION LINK REDUNDANCY FOR DISTRIBUTED ANTENNA SYSTEMS

Andrew Wireless Systems G...

1. A transceiver interface circuit, the circuit comprising:an optical transceiver having a signal path configured to input at least one optical signal or output at least one optical signal;
a compensation attenuator in the signal path configured to selectably attenuate the at least one optical signal;
a memory comprising a first attenuation setting associated with a first optical cable and a second attenuation setting associated with a second optical cable;
wherein the circuit is configured to receive an input indicating whether a switch is configured to a first state that passes the at least one optical signal via the first optical cable or configured to a second state that passes the at least one optical signal via the second optical cable;
wherein the circuit is configured to load into the compensation attenuator either the first attenuation setting or the second attenuation signal in response to the input.

US Pat. No. 10,833,780

CONFIGURATION SUB-SYSTEM FOR TELECOMMUNICATION SYSTEMS

Andrew Wireless Systems G...

1. A device for a distributed antenna system, the device comprising:a downlink signal path configured to be communicatively coupled to a base station, receive a downlink service signal sourced from the base station, to adjust a signal gain of the downlink service signal, and to output the gain-adjusted downlink service signal;
a test signal generator integrated into the device comprising the downlink signal path configured to receive the downlink service signal sourced from the base station and to adjust the signal gain of the downlink service signal, wherein the test signal generator is configured to selectively provide a test signal to the downlink signal path; and
a power measurement device integrated into the device comprising the downlink signal path configured to receive the downlink service signal sourced from the base station and to adjust the signal gain of the downlink service signal, the power measurement device being configured to measure a power of the test signal at a measurement point in the downlink signal path of the device.

US Pat. No. 10,785,827

MASTER UNIT, REMOTE UNIT AND MULTIBAND TRANSMISSION SYSTEM

Andrew Wireless Systems G...

1. A system, comprising:a master unit communicatively coupled to an optical media and configured to:
receive a digital data signal from a digital network;
receive MIMO radio frequency signals to be wirelessly transmitted;
modulate the digital data signal to form a coded digital data signal using a reference frequency signal for clocking;
frequency mix at least one of the MIMO radio frequency signals from an original frequency to a different frequency using the reference frequency signal; and
optically transport a combined signal including the reference frequency signal, the coded digital data signal, and the MIMO radio frequency signals across the optical media; and
a remote unit communicatively coupled to the optical media and configured to:
receive the combined signal from the master unit via the optical media;
demodulate the coded digital data signal to form the digital data signal using the reference frequency signal for clocking;
frequency mix the at least one of the MIMO radio frequency signals to the original frequency from the different frequency using the reference frequency signal; and
enable access to at least one other component of the system through at least one service channel.