US Pat. No. 10,034,191

AMBIGUITY RESOLUTION IN POSITIONING MEASUREMENTS

SEQUANS COMMUNICATIONS S....

1. A computer implemented method of providing reference signal time difference (RSTD) data comprising:receiving an uncertainty window centered around an expected RSTD value;
determining a power-delay profile (PDP) of each reference orthogonal frequency division multiplexing (OFDM) symbol within the uncertainty window;
calculating a parameter indicative of signal quality for each determined PDP, and obtaining a main PDP having the highest signal quality;
obtaining a preceding PDP of the main PDP;
obtaining a succeeding PDP of the main PDP;
determining PDP metrics comprising:
determining a channel metric for each of the main, preceding and succeeding PDPs;
determining a channel main tap for each of the main, preceding and succeeding PDPs;
determining a delay estimate for each of the main, preceding and succeeding PDPs; and
wherein if the main PDP is a combined PDP, wherein a combined PDP is determined from a plurality of reference OFDM symbols, performing coherence testing on the PDP metrics to detect any ambiguity in the delay estimate of the main PDP, and correcting any ambiguity.

US Pat. No. 9,432,097

ENHANCED MODULATION

Sequans Communications S....

1. A method of transmitting data comprising:
selecting a plurality of transmit modulation schemes for the data transmission;
selecting a plurality of antennae for the data transmission;
determining combinations of the selected transmit modulation schemes and the selected antennae for communicating the data
to a receiver; wherein

a first set of the combinations comprise a first modulation scheme and a second set of the combinations comprise a second
different modulation scheme; and

when transmitting, combinations are selected based on bits of the data to be transmitted;
wherein the transmit modulation schemes comprise a plurality of signal constellations and wherein the plurality of signal
constellations comprise interpolated constellations.

US Pat. No. 9,800,420

EMBMS OVER LAN

SEQUANS COMMUNICATIONS S....

1. An LTE device comprising one or more processors and associated memory, the one or more processors provided with instructions
configured to
connect to an LTE network;
connect to or provide a LAN;
provide eMBMS services from the LTE network over the LAN;
the LTE device further configured to utilize a Temporary Mobile Group Identifier that can identify an eMBMS session and reference
the eMBMS session and its associated data, wherein the Temporary Mobile Group Identifier is associated with resources containing
eMBMS session data;

the LTE device further comprising a retransmission function configured to receive retransmission requests from a client device
and to retransmit eMBMS data to the client device in accordance with the request.

US Pat. No. 10,608,862

NOMA SCHEME

Sequans Communications S....

1. A method of transmission for increasing communication channel capacity comprising:superposing a first signal on a portion of a second signal to form a combined signal, wherein:
the first signal comprises a repetition coded signal;
a plurality of subcarriers is used to transmit the second signal;
a portion of the plurality of subcarriers is used to transmit the portion of the second signal, the portion of the plurality of subcarriers comprising multiple ones of the plurality of subcarriers; and
superposing the first signal on the portion of the second signal comprises spreading the first signal over the portion of the plurality of subcarriers used to transmit the portion of the second signal; and
transmitting the combined signal.

US Pat. No. 10,362,556

MESSAGING SCHEME FOR POSITIONING

Sequans Communications S....

1. A method of providing position assistance to a UE, the method comprising:providing, by a location server, at least one unsolicited message, each message comprising one of data selected from a list comprising:
GNSS ephemeris assistance data;
GNSS acquisition assistance data;
OTDOA assistance data; and
eNB position data for a predefined area;
wherein the at least one unsolicited message further comprises reliability data defining a reliability of the message data wherein the reliability data is indicative of a period of time when the at least one unsolicited message data can be considered reliable; and wherein the reliability data comprises a geographical area of applicability of the at least one unsolicited message data.

US Pat. No. 10,528,009

PHASE COMPENSATED PLL

SEQUANS COMMUNICATIONS S....

1. A phase locked loop (PLL) comprising a time to digital converter (TDC) and a fractional-n feedback loop, the PLL being configurable by a configurable divider module, which is configurable by a phase compensator module to reduce the dynamic range of the TDC required to maintain PLL performance.

US Pat. No. 10,219,238

OTDOA IN LTE NETWORKS

Sequans Communications S....

1. A computer implemented method for providing Observed Time-Difference of Arrival (OTDOA) timing information comprising:defining a Fast Fourier Transform (FFT) window pair for estimating a value of reference signal time difference (RSTD) for at least one base station and a reference cell;
receiving a Positioning Reference Signal (PRS) from the at least one base station and the reference cell;
executing an FFT per OFDM symbol of the PRS for each FFT window of the FFT window pair;
obtaining a first FFT output vector per OFDM symbol of each FFT window;
for each first output vector, descrambling tones corresponding to the known position of the PRS, wherein all other tones are set to zero;
combining vectors based on respective first FFT output vectors;
executing an inverse Fast Fourier Transform (iFFT) to convert to the time domain; and
calculating an estimated value of RSTD for the at least one base station and the reference cell;
the method further comprising attempting to find a single pair of FFT windows wherein the first FFT window spans search windows from the at least one base station and the reference cell to be measured, and when the single pair of FFT windows cannot be found that spans the search windows, using a plurality of FFT window pairs.

US Pat. No. 10,608,674

FLEXIBLE ERROR CORRECTION

SEQUANS COMMUNICATIONS S....

1. A method of configuring an error correction engine, the method comprising:determining the frequency of operation of the error correction engine;
determining the size of the code to be error corrected;
determining the time permitted in which to error correct the code, wherein the time permitted is based on a number of allocated resource blocks; and
based on the determining steps, configuring the number of maximum a posteriori (MAP) engines within the error correction engine to be used to error correct the code.

US Pat. No. 10,243,776

ENHANCED SPATIAL MULTIPLEXING

Sequans Communications S....

1. A method of spatially multiplexing data comprising a signal vector, the method comprising:selecting first and second modulation schemes for a data transmission wherein the second modulation scheme is an interpolation in the plane of the first modulation scheme; and further wherein the modulation schemes are selected so as to maintain the same minimum Euclidean distance between vectors comprising the first and second modulation schemes as the minimum Euclidean distance within the first and second modulation schemes; and
selecting a plurality of antennae, each of the plurality to concurrently transmit respective symbols of the signal vector;
wherein a portion of the respective symbols taking their values from the first modulation scheme take their values from a subset of the first modulation scheme; and wherein points of the subset of the first modulation scheme have reduced energy compared to other points of the first modulation scheme;
wherein the first modulation scheme comprises a first constellation and the second modulation scheme comprises a second constellation;
wherein third and fourth constellations are provided by a second interpolation;
wherein a combination of modulation schemes used to transmit the signal vector is represented by two binary sequences, one of the two binary sequences forms a repetition code and the other binary sequence forms a parity-check code.

US Pat. No. 10,531,416

RANGE EXTENSION OF LTE CELLS

SEQUANS COMMUNICATIONS S....

1. A method of synchronizing uplink between a user equipment (UE) and a cell, the method comprising:determining physical random access channel (PRACH) capabilities of the UE;
determining a negative timing offset for use with a transmission of at least one PRACH signal;
determining an order for utilizing the negative timing offset;
transmitting from the UE, at least one PRACH signal from a group of PRACH signals, each of the at least one PRACH signals having a predetermined power level and transmitted by the UE at a time based on the negative timing offset, the order, and the PRACH capabilities of the UE.

US Pat. No. 10,264,616

LTE TRANSMISSION IN UNLICENSED BANDS

SEQUANS COMMUNICATIONS S....

1. A method of receiving long-term evolution (LTE) data by a user device, the data being transmitted on a channel of an unlicensed band, the method comprising:receiving a cell ID from a primary LTE cell;
receiving system information from the primary LTE cell for access to an unlicensed channel;
receiving LTE user plane and control plane data on the channel of an unlicensed band; wherein the unlicensed channel is served by a secondary LTE cell identified by the received cell ID and that is of a different eNodeB than the primary LTE cell;
the method further comprising the user device decoding a WiFi header from the channel of the unlicensed band and wherein the user device turns off its LTE in unlicensed spectrum (LTE-U) WiFi capable receiver for a duration specified in the header if the header indicates that the WiFi header has not originated from the secondary LTE cell.

US Pat. No. 10,993,244

ENHANCED NOMA SCHEME

SEQUANS COMMUNICATIONS S....

1. A method of transmission for increasing communication channel capacity comprising:superposing a first signal on a second signal to form a combined signal, wherein allocation of users of the communication channel to the first and second signals is based dynamically on channel conditions, wherein the first signal comprises MC-CDMA and the second signal comprises OFDMA and wherein OFDMA resources are allocated to the N users with the highest received signal power at the base station, and MC-CDMA resources are allocated to the remaining M users.

US Pat. No. 10,644,734

LOW-IF RECEIVER

SEQUANS COMMUNICATIONS S....

1. A method of selecting an intermediate frequency, IF, for use with a low-IF receiver, the method comprising:selecting a negative IF if a second frequency is less than a first frequency;
wherein the first frequency is defined as the central frequency of the system bandwidth of an RF signal received by the low-IF receiver; and
wherein the second frequency is defined as the central frequency of the bandwidth of a wanted RF signal within the system bandwidth of the RF signal received by the low-IF receiver.

US Pat. No. 10,892,885

OFDM SYNCHRONIZATION EVALUATION

SEQUANS COMMUNICATIONS S....

1. A method of evaluating orthogonal frequency division multiplexing (OFDM) synchronization between a transmitter and a receiver, the method carried out at the receiver and comprising:obtaining a non-coherent channel power estimate;
obtaining a coherent channel power estimate;
comparing the two estimates; and
determining whether the receiver and the transmitter are synchronized based on the comparison.

US Pat. No. 10,753,966

DUTY CYCLE ESTIMATION

SEQUANS COMMUNICATIONS S....

1. A duty cycle measuring circuit, the circuit comprising:a synchronizer and a measurer;
the synchronizer arranged such that when a signal to be measured comprising pulses having a pulse width and a pulse period is input to the synchronizer, synchronizing signals corresponding to each of pulse rising edge, pulse falling edge, pulse period start and pulse period end are output from the synchronizer, each synchronizing signal comprising a rising or falling edge;
wherein the synchronizing signal outputs from the synchronizer are input to the measurer, and wherein the measurer is arranged to provide two measurement outputs based on the synchronizing signal inputs from the synchronizer, the measurement outputs comprising a first measurement output signal indicative of a pulse period measurement of the signal to be measured and a second measurement output signal indicative of a pulse width measurement of the signal to be measured.

US Pat. No. 10,707,841

DRIVING CIRCUIT FOR SINGLE CRYSTAL RTC AND RF CLOCK

SEQUANS COMMUNICATIONS S....

1. A crystal driving circuit comprising:a circuit input node and a circuit output node;
a high power amplifier having a power consumption of more than 100 ?W;
a low power amplifier comprising a power consumption less than 10 ?W;
the circuit being arranged to selectively isolate the high power amplifier and associated load capacitance from the circuit input node and the circuit output node.

US Pat. No. 10,951,197

ON-CHIP BALUN

SEQUANS COMMUNICATIONS S....

1. An on-chip balun comprising:a primary side;
a secondary side; and
a notch filter, wherein the notch filter comprises a capacitance in parallel with a portion of the primary side and a capacitance in parallel with a portion of the secondary side.

US Pat. No. 10,868,571

ADAPTIVE-SCL POLAR DECODER

Sequans Communications S....

1. A method of dynamically changing the list size of a successive cancellation list (SCL) decoder, the SCL decoder arranged to decode data received from a wireless communications system, the method comprising:at each successive cancellation stage of the SCL decoder, determining a path metric of each path of the SCL decoder;
selecting a differential path metric threshold;
dynamically changing the list size of the SCL decoder based on the differential path metric threshold and the path metric of each path of the cancellation stage, such that decoding sensitivity of the SCL decoder is maintained and/or latency and error-correction performance of the SCL decoder are balanced.