US Pat. No. 9,231,836

ROBUST CHANNEL ESTIMATION OF OFDM SYSTEMS

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1. A method for estimating a channel by a device in wireless communication systems using Orthogonal Frequency Division Multiplexing
(OFDM) and Orthogonal Frequency Division Multiple access (OFDMA), the method comprising steps of:
obtaining a Maximum Likelihood (ML) estimate of a said channel frequency response and said channel on pilot locations;
performing a hypothesis test on said ML estimate to obtain information about a structure of said channel;
using information obtained from said hypothesis test about said structure of said channel to derive a shrinkage target;
obtaining refined channel frequency response estimates on said pilot locations and refined channel estimates by using a biased
estimator to shrink said ML estimate towards said shrinkage target; and

interpolating said refined channel frequency response estimates and/or said refined channel estimates using a filter to get
a set of complete channel frequency response estimates and channel estimates of said channel over time-frequency block.

US Pat. No. 9,564,987

ADAPTIVE LINK ADAPTATION SYSTEM AND METHOD

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1. A method for selecting a modulation and coding scheme (MCS) for transmission on at least one communication channel, the
method comprising:
computing at least one transition probability matrix including a plurality of MCS indices, wherein said transition probability
matrix comprises at least one probability of transition from one MCS index to another MCS index in said plurality of MCS indices;
and

selecting a MCS index, from said plurality of MCS indices, having a highest transition probability in said transition probability
matrix for transmission.

US Pat. No. 9,312,978

PILOT AIDED DATA TRANSMISSION AND RECEPTION WITH INTERFERENCE MITIGATION IN WIRELESS SYSTEMS

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1. A method of implementing a receiver in a wireless communication network that transmits data using a plurality of antennas,
said network using a unique pilot pattern corresponding to a sector number of a sector such that no two sectors with different
sector numbers have pilots in same location in their respective pilot patterns, wherein said pilot pattern comprises of pilot
tones and null tones, said method comprising:
estimating a channel;
obtaining interference samples of desired sector at each pilot location by removing signal component from received signal;
estimating a first interference covariance at all pilot locations from said samples for said desired sector;
estimating a second interference covariance from said null tones;
adding said first and second interference covariances obtained to get overall interference covariance estimate; and
determining weights for a filter at said receiver.

US Pat. No. 9,661,643

COGNITIVE INTERFERENCE MANAGEMENT IN WIRELESS NETWORKS WITH RELAYS, MACRO CELLS, MICRO CELLS, PICO CELLS AND FEMTO CELLS

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1. A method for interference management in heterogeneous/homogeneous communication networks, wherein the communication networks
comprise one or more Base Stations (BS), Relay Stations (RS), Femto Base Stations (FBS), Pico Base Stations (PBS), and Micro
Base Stations (MBS), said method comprising:
a plurality of User Equipment (UEs) performing interference measurement for a specific group of said BS, RS, FBS, PBS, and
MBS and said UE sending said interference measurement to a serving BS;

said serving BS classifying each of the UEs as either a victim UE of said BS, RS, FBS, PBS, and MBS or as a safe UE based
on the measurement received from said UEs;

said serving BS sending to each of said BS, FBS, PBS, and MBS a list of victim UEs, and said RS either receiving a list of
its victim UEs from said serving BS or from uplink (UL) signaling; and

each of said BS, RS, FBS, PBS, and MBS performing resource allocation for said UEs of said BS, RS, FBS, PBS, and MBS, wherein
a set of resources in said resource allocation is partially or completely orthogonal to resources in time and/or frequency
and/or code and/or space utilized by said victim UEs of said BS, RS, FBS, PBS, and MBS.

US Pat. No. 9,923,706

SYSTEM AND METHOD FOR IN BAND FULL DUPLEX COMMUNICATION IN RADIO NETWORK

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1. A method for In Band Full Duplex (IBFD) communication in a radio network comprising at least one IBFD node, at least one
first non-IBFD User Equipment (UE), and at least one second non-IBFD UE, the method comprising:
transmitting by the at least one IBFD node a first signal to the at least one first non-IBFD UE over a forward channel, and
receiving by the at least one IBFD node a second signal from the at least one second non-IBFD UE over the same forward channel
simultaneously, wherein the second signal comprising at least one of a pilot signal, Channel State Information (CSI), and
control information, wherein the forward channel is orthogonal to a reverse channel in at least one of time, frequency, space,
and code.

US Pat. No. 9,843,409

MULTIPLE-INPUT MULTIPLE-OUTPUT METHOD FOR ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING BASED COMMUNICATION SYSTEM

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1. A Multiple-Input Multiple-Output (MIMO) method for an Orthogonal Frequency Division Multiplexing (OFDM) based communication
system, the method comprising:
selecting, by a transmitter, a plurality of precoder matrices for a plurality of receivers, wherein the plurality of precoder
matrices is dynamically cycled within an allocated resource, wherein a size of each of the precoders matrix depends on a number
of receivers paired and a number of data streams for each of the receivers; and

transmitting, by the transmitter, a symbol vector precoded with the plurality of precoder matrices over MIMO channel associated
with the plurality of receivers.

US Pat. No. 9,049,678

INDOOR PERSONAL RELAY

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1. A method to enable a relay to associate with a best Base Station (BS) in a wireless communication network, said method
comprising of:
said relay searching for said best BS;
said relay attaching to said best BS;
said relay sending list of Closed Subscriber Group (CSG) UEs to said best BS;
said best BS checking if at least one of said CSG UEs is attached to said best BS;
said relay completing association procedure with said best BS if at least one CSG UE is attached to said best BS;
said relay associating with said best BS if no BS with at least one said CSG UE is found when a pre-specified number of association
attempts have been reached;

said relay entering into an idle mode; and
said relay entering into an active mode, on receiving a message from said best BS that at least one said CSG UE is detected
in vicinity of said relay.

US Pat. No. 10,122,426

METHOD FOR BEAM STEERING IN MULTIPLE-INPUT MULTIPLE-OUTPUT SYSTEM

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1. A method for beam steering in a Multiple Input Multiple Output (MIMO) system, the method comprising:forming and transmitting, by a transmitter, a plurality of transmit beams to at least one receiver;
obtaining, by the transmitter, at least one optimal transmit beam selected from the plurality of transmit beams by the at least one receiver and at least one of at least one Channel Quality Indicator (CQI) of at least one transmit beam from the plurality of transmit beams, at least one Channel State Information (CSI) of the at least one transmit beam from the plurality of transmit beams, and a location of the at least one receiver; and
steering, by the transmitter, the at least one optimal transmit beam towards the at least one receiver based on the at least one optimal transmit beam selected from the plurality of transmit beams by the at least one receiver and the at least one of the at least one CQI of the at least one transmit beam from the plurality of transmit beams, the at least one CSI of the at least one transmit beam from the plurality of transmit beams, and the location of the at least one receiver.

US Pat. No. 9,641,237

INDOOR PERSONAL RELAY

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1. A method to enable a relay to associate with a Base Station (BS) in a wireless communication network, said method comprising
of:
powering on said relay;
said relay searching for a best BS;
said relay attaching to said best BS;
said relay sending a list of Closed Subscriber Group (CSG) user equipment (UEs) of said relay to said best BS;
said best BS checking with a neighboring BS when at least one of said CSG UEs are attached with said neighboring BS, when
said best BS finds that none of said CSG UEs are attached to said best BS;

said best BS instructing said relay to hand over said relay to said neighboring BS, when said neighboring BS confirms a presence
of at least one CSG UE attached to said neighboring BS and when association criteria are satisfied;

a UE in a coverage area of said relay measuring received signal strengths from a plurality of base stations (BSs);
said UE in said coverage area of said relay measuring received signal strengths from at least one relay when said at least
one relay has been instructed by its serving BS to transmit a unique identifier of said relay, cell barring message, and system
information; and

said UE in said coverage area of said relay checking for a cell barring message in the transmission of said unique identifier.

US Pat. No. 9,083,399

PRECODING FOR SINGLE TRANSMISSION STREAMS IN MULTIPLE ANTENNA SYSTEMS

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1. A method for transmission of a signal from a plurality of antennas, in a frequency band, said method comprising:
splitting said frequency band into a plurality of at least one group of subcarriers; and
transmitting on each of said at least one group of subcarriers from said plurality of antennas, simultaneously, using a one
or two dimensional precoder, wherein said precoder is a complex weight specific to said plurality of antennas and said group
of subcarriers, wherein said complex weight further relies on at least one of a time index of said at least one group of subcarriers;
and a frequency index of said group of subcarriers, wherein said frequency band is divided into a plurality of frequency partitions,
wherein said plurality of frequency partitions are further divided into a plurality of frequency sub partitions, and wherein
said plurality of sub partitions comprise of a plurality of Physical Resource Units (PRUs) and said plurality of PRUs are
further divided into a plurality of subcarriers.

US Pat. No. 9,722,712

INTERFERENCE MANAGEMENT FOR A DISTRIBUTED SPATIAL NETWORK

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1. A communication network comprising of:
at least one network controller;
at least one remote base station connected to said at least one network controller, wherein said at least one network controller
controls functioning of said at least one remote base station; and

a plurality of antenna ports connected to said at least one remote base station, wherein each antenna port comprises at least
one antenna; wherein said remote base station controls functioning of said plurality of antenna ports, wherein said plurality
of antenna ports are synchronized to said remote base station in at least one of time, and frequency; and

wherein said at least one network controller is configured for assigning entry and exit points for each remote base station.

US Pat. No. 9,913,179

METHOD AND SYSTEM TO TRIGGER UE HANDOVER IN A RADIO COMMUNICATION NETWORK

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1. A method for triggering a User Equipment (UE) handover in a radio communication network comprising at least one serving
base station and a plurality of candidate base stations, the method comprising:
sharing a first configuration parameter associated with said UE with said plurality of candidate base stations by said at
least one serving base station, wherein said UE is associated with said serving base station, wherein said first configuration
parameter comprises one of:

at least one of a Sounding Reference Signal (SRS) transmission sequence identifier assigned to said UE by said serving base
station, a transmission schedule of said SRS transmission, a periodicity of said SRS transmission, and a SRS transmit power
of said UE, and

one of a reference signal, a Demodulation Reference Signal (DMRS), and a Physical Random Access Channel (PRACH);
obtaining information derived from an uplink transmission of said UE by a candidate base station from said plurality of candidate
base stations to detect whether said UE is within its radio coverage, wherein said information is obtained using one of: proactively
by said candidate base station and from said serving base station without said serving base station requesting for said information
from said UE, wherein said information comprises at least one of said first configuration parameter and a second parameter;

reporting said second parameter associated with said candidate base station by said candidate base station to said serving
base station in response to detecting that said UE is within radio coverage of said candidate base station, wherein said second
parameter includes an uplink time-alignment of said UE with respect to said candidate base station, wherein said serving base
station determines a need to transmit control signals, by said candidate base station to said UE, after said candidate base
station reports a presence of said UE within radio coverage of said candidate base station; and

determining, at said serving base station, whether said second parameter meets a handover criteria to trigger said UE handover
to said candidate base station based on one of capabilities of said UE, and Geo-location of said UE.

US Pat. No. 10,193,649

INTERFERENCE CANCELLING BLOCK MODULATION

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1. A method for enabling communications in a communication network, the method comprising:transmitting, by a transmitter, information of the number of receiver antennas at user equipments (UEs) intended to be scheduled by said transmitter in common resource elements, to a controller in said communication network;
receiving, by said transmitter, a number of non-Interference Cancelling Block Modulation (ICBM) transmissions from said controller; and
transmitting, by said transmitter, information indicating cell-identification numbers of participating transmitters, and corresponding index of ICBM precoder matrix of said participating transmitters to said UEs, wherein said controller evaluates a number of non-distinct ICBM precoder matrices for said participating transmitters based on a minimum number of said receiver antennas among said UEs.

US Pat. No. 10,536,314

OFDMA APPARATUS AND METHOD THEREOF FOR PERFORMING OFDM BASED COMMUNICATION IN WIRELESS COMMUNICATION SYSTEM

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1. An Orthogonal Frequency Division Multiple Access (OFDMA) method for performing Orthogonal Frequency Division Multiplexing (OFDM) based communication in a wireless communication system, comprising:splitting by an first OFDMA apparatus a carrier bandwidth into a number of subbands;
modulating by the first OFDMA apparatus resource units in each of the subbands with data symbols in a parallel manner;
multiplexing by the first OFDMA apparatus the resource units by transforming each of the modulated resource units through a plurality of first unitary transformations;
generating by the first OFDMA apparatus a plurality of first OFDM signals by performing a parallel to serial conversion of the transformed resource units;
multiplexing by the first OFDMA apparatus samples of at least one OFDM signal from the plurality of first OFDM signals by transforming the samples through a second unitary transformation;
generating by the first OFDMA apparatus a second OFDM signal by performing a parallel to serial conversion of the transformed samples; and
transmitting by the first OFDMA apparatus the second OFDM signal over a wireless channel to a second OFDM apparatus in the wireless communication system.

US Pat. No. 10,798,734

METHOD AND WIRELESS DEVICE FOR TRANSMITTING RACH PREAMBLE IN WIRELESS COMMUNICATION NETWORK

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1. A method for transmitting a Physical Random Access Channel (PRACH) preamble in a wireless communication network, the method comprising:dividing, by a wireless device, a Narrowband Physical Random Access Channel (NPRACH) preamble into a plurality of symbol groups;
selecting, by the wireless device, at least one first symbol group from the plurality of symbol groups and at least one second symbol group from the plurality of symbol groups;
adding, by the wireless device, a first Guard Period (GP) between the at least one first symbol group and the at least one second symbol group, wherein the first GP is added at the end of the at least one first symbol group;
adding, by the wireless device, a second GP at an end of the at least one second symbol group; and
transmitting, by the wireless device, the at least one first symbol group along with the first GP in first available consecutive Up-Link (UL) sub-frames; and
transmitting, by the wireless device, the at least one second symbol group along with the second GP in subsequent consecutive UL sub-frames after transmission of the at least one first symbol group along with the first GP, wherein the first available consecutive UL sub-frames and the subsequent consecutive UL sub-frames are reserved for UL transmission in at least one frame duration.

US Pat. No. 10,715,240

METHOD FOR BEAM STEERING IN MULTIPLE-INPUT MULTIPLE-OUTPUT SYSTEM

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1. A method for beam steering in a Multiple Input Multiple Output (MIMO) system, the method comprising:determining, by a transmitter, an inter-antenna element spacing to be achieved based on at least one of a location of at least one receiver, at least one CQI, at least one CSI, and interference information;
determining, by the transmitter, a number of antenna elements of the transmitter to be selected to achieve the inter-antenna element spacing;
achieving, by the transmitter, said inter-antenna element spacing by dynamically selecting antenna elements from a plurality of antenna elements of the transmitter based on the determined number of antenna elements;
determining, by the transmitter, a precoder matrix based on the inter-antenna element spacing; and
steering, by the transmitter, a transmit beam using the precoder matrix towards the at least one receiver.