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    Transmission resource allocation by splitting physical resource blocks
    53.
    发明授权
    Transmission resource allocation by splitting physical resource blocks 有权

    公开(公告)号：US11632791B2

    公开(公告)日：2023-04-18

    申请号：US17661539

    申请日：2022-04-29

    Applicant: Cohere Technologies, Inc.

    Inventor： Yoav Hebron ,  Christian Ibars Casas ,  Ronny Hadani ,  Shachar Kons

    IPC: H04L5/00 ,  H04W72/53 ,  H04W72/0446 ,  H04W72/0453

    Abstract: Methods, systems and devices for providing transmission resources that achieve transmission diversity while reducing pilot signal overhead are described. An exemplary wireless communication method may be implemented in a wireless communication system in which transmission resources are allocated on a per physical resource block (PRB) basis, where a PRB corresponds to a two dimensional resource pattern comprising a first number of subcarriers along a frequency dimension and a second number time slots along a time dimension. The method includes logically dividing subcarriers in each PRB into an integer number of sub-groups of sub-carriers, wherein the integer number is greater than one, allocating, to a transmission, transmission resources corresponding to one or more of the sub-groups of subcarriers, performing the transmission in the wireless communication system.

    Forward error correction using non-binary low density parity check codes
    54.
    发明授权
    Forward error correction using non-binary low density parity check codes 有权

    公开(公告)号：US11632133B2

    公开(公告)日：2023-04-18

    申请号：US17451251

    申请日：2021-10-18

    Applicant: Cohere Technologies, Inc.

    Inventor： Vamadevan Namboodiri ,  Ronny Hadani ,  Stuart Abrams

    IPC: H03M13/11 ,  H03M13/25 ,  H03M13/00 ,  H03M13/29 ,  H03M13/39

    Abstract: Methods, systems and devices for forward error correction in orthogonal time frequency space (OTFS) communication systems using non-binary low-density parity-check (NB-LDPC) codes are described. One exemplary method for forward error correction includes receiving data, encoding the data via a non-binary low density parity check (NB-LDPC) code, wherein the NB-LDPC code is characterized by a matrix with binary and non-binary entries, modulating the encoded data to generate a signal, and transmitting the signal. Another exemplary method for forward error correction includes receiving a signal, demodulating the received signal to produce data, decoding the data via a NB-LDPC code, wherein the NB-LDPC code is characterized by a matrix with binary and non-binary entries, and providing the decoded data to a data sink.

    Lattice reduction in wireless communication
    55.
    发明授权
    Lattice reduction in wireless communication 有权

    公开(公告)号：US11533203B2

    公开(公告)日：2022-12-20

    申请号：US17445707

    申请日：2021-08-23

    Applicant: Cohere Technologies, Inc.

    Inventor： Vamadevan Namboodiri ,  Ronny Hadani ,  James Delfeld

    IPC: H04W4/80 ,  H04L25/03 ,  H04L1/06 ,  H04L5/00 ,  H04L27/26

    Abstract: Methods, systems and devices for lattice reduction in decision feedback equalizers for orthogonal time frequency space (OTFS) modulation are described. An exemplary wireless communication method, implementable by a wireless communication receiver apparatus, includes receiving a signal comprising information bits modulated using OTFS modulation scheme. Each delay-Doppler bin in the signal is modulated using a quadrature amplitude modulation (QAM) mapping. The method also includes estimating the information bits based on an inverse of a single error covariance matrix of the signal, with the single error covariance matrix being representative of an estimation error for all delay-Doppler bins in the signal.

    RECIPROCAL GEOMETRIC PRECODING
    56.
    发明申请
    RECIPROCAL GEOMETRIC PRECODING 有权

    公开(公告)号：US20220321181A1

    公开(公告)日：2022-10-06

    申请号：US17596233

    申请日：2020-06-05

    Applicant: Cohere Technologies, Inc.

    Inventor： Ronny Hadani ,  Shachar Kons

    IPC: H04B7/0456 ,  H04W52/14 ,  H04B7/024 ,  H04B7/0452

    Abstract: Methods, systems and devices for reciprocal geometric precoding are described. One example method includes determining, by a network device, an uplink channel state using reference signal transmissions received from multiple user devices, and generating a precoded transmission waveform for transmission to one or more of the multiple user devices by applying a precoding scheme that is based on the uplink channel state, wherein the uplink channel state completely defines the precoding scheme. In some embodiments, the reference signal transmissions and the precoded transmission waveform are multiplexed using either time-domain multiplexing or frequency-domain multiplexing.

    RECIPROCAL CALIBRATION FOR CHANNEL ESTIMATION BASED ON SECOND-ORDER STATISTICS
    57.
    发明申请
    RECIPROCAL CALIBRATION FOR CHANNEL ESTIMATION BASED ON SECOND-ORDER STATISTICS 有权

    公开(公告)号：US20220263686A1

    公开(公告)日：2022-08-18

    申请号：US17662590

    申请日：2022-05-09

    Applicant: Cohere Technologies, Inc.

    Inventor： Shachar Kons ,  Ronny Hadani ,  Paul Harris

    IPC: H04L25/02 ,  H04B7/0413 ,  H04L5/00

    Abstract: A wireless communication method includes receiving, by a first wireless device during a training phase, reference tones using a first number of resource elements from a transmitter of a second wireless device, wherein the first wireless device comprises multiple receiving antennas, estimating, by the first wireless device, from the receiving the reference tones, a second order statistics of wireless channels between the multiple receiving antennas and the transmitter of the second wireless device, and performing channel estimation, during an operational phase subsequent to the training phase, using the second order statistics and reference tones received on a second number of resource elements, wherein the second number is less than the first number.

    COMMUNICATION TECHNIQUES USING QUASI-STATIC PROPERTIES OF WIRELESS CHANNELS
    59.
    发明申请
    COMMUNICATION TECHNIQUES USING QUASI-STATIC PROPERTIES OF WIRELESS CHANNELS 有权

    公开(公告)号：US20220141841A1

    公开(公告)日：2022-05-05

    申请号：US17450498

    申请日：2021-10-11

    Applicant: Cohere Technologies, Inc.

    Inventor： Andreas Molisch ,  Ronny Hadani ,  Robert Fanfelle

    IPC: H04W72/12 ,  H04B17/309 ,  H04L5/00 ,  H04L25/02

    Abstract: Methods, devices and systems for communication techniques that use the quasi-static properties of wireless channels are described. One example method to improve communication performance includes receiving a set of pilots over a transmission channel between the wireless communication apparatus and a far-end communication apparatus, the transmission channel comprising a first portion that is time-invariant and a second portion that is time-variant, processing the received set of pilots to generate an estimate of the first portion, processing the received set of pilots to generate an estimate of the second portion, and performing a communication based on a channel state information that is a weighted combination of a first term based on the estimate of the first portion and a second term based on the estimate of the second portion.

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