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    Matched-filter radio receiver
    3.
    发明授权
    Matched-filter radio receiver 有权

    公开(公告)号：US11228471B2

    公开(公告)日：2022-01-18

    申请号：US16957946

    申请日：2019-01-03

    申请人： Nordic Semiconductor ASA

    发明人： Wei Li ,  Daniel Ryan

    IPC分类号： H04L27/00 ,  H04L27/233 ,  H04B1/12 ,  H04L27/148

    摘要： A digital radio receiver has a matched filter bank of filter modules for receiving phase- or frequency-modulated radio signals. Each module cross-correlates a sampled signal with a respective multi-symbol filter sequence, using a plurality of samples in each symbol period. The matched filter bank calculates first values (zn(1)), for respective symbol periods, of a cross-correlation of the sampled signal with a first complex exponential function defined at sample points over one symbol period, and calculates second values (zn(−1)), for the respective symbol periods, of a cross-correlation of the sampled signal with a second, different, complex exponential function. A set of the filter modules cross-correlates the sampled signal with their respective filter sequences using an algorithm that takes, as input, the first values (zn(1)) for symbol periods at which the respective filter sequence has a first value, and the second values (zn(−1)) for symbol periods at which the filter sequence has a second, different, value.

    Cooperative wireless networks
    4.
    发明授权
    Cooperative wireless networks 有权

    公开(公告)号：US11201644B2

    公开(公告)日：2021-12-14

    申请号：US14727769

    申请日：2015-06-01

    申请人： Genghiscomm Holdings, LLC

    发明人： Steve Shattil

    IPC分类号： H04B7/0452 ,  H04B1/00 ,  H04B7/026 ,  H04J13/00 ,  H04L27/26 ,  H04L12/707 ,  H04L12/801 ,  H04L5/00 ,  H04B7/0456 ,  H04B7/024 ,  H04B7/06 ,  H04L27/01 ,  H04L27/148 ,  H04J13/12 ,  H04W72/04 ,  H04W84/18

    摘要： A cooperative multi-user multiple input, multiple output (MIMO) antenna array comprises a MIMO subspace processing system communicatively coupled by a fronthaul network to a set of antennas residing on multiple ones of a plurality of geographically distributed wireless terminals in a Radio Access Network. The MIMO subspace processing system can comprise a distributed computing system. The MIMO antenna array is adapted by updating the set of antennas to produce a second set of antennas; reconfiguring the fronthaul network; selecting an updated set of distributed computing resources to perform MIMO subspace processing; and reconfiguring the MIMO subspace processing to employ channel state information of the second set to enable multiple non-interfering subspace channels occupying a common frequency.

    SYNCHRONOUSLY-SWITCHED MULTI-INPUT DEMODULATING COMPARATOR
    5.
    发明申请
    SYNCHRONOUSLY-SWITCHED MULTI-INPUT DEMODULATING COMPARATOR 有权

    公开(公告)号：US20210336824A1

    公开(公告)日：2021-10-28

    申请号：US17367392

    申请日：2021-07-04

    申请人： Kandou Labs SA

    发明人： Armin Tajalli

    IPC分类号： H04L27/20 ,  H04L25/02 ,  H04L25/49 ,  H04L27/148 ,  H04L27/26

    摘要： Methods and systems are described for obtaining a set of carrier-modulated symbols of a carrier-modulated codeword, each carrier-modulated symbol received via a respective wire of a plurality of wires of a multi-wire bus, applying each carrier-modulated symbol of the set of carrier-modulated symbols to a corresponding transistor of a set of transistors, the set of transistors further connected to a pair of output nodes according to a sub-channel vector of a plurality of mutually orthogonal sub-channel vectors, recovering a demodulation signal from the carrier-modulated symbols, and generating a demodulated sub-channel data output as a differential voltage on the pair of output nodes based on a linear combination of the set of carrier-modulated symbols by controlling conductivity of the set of transistors according to the demodulation signal.

    Cable modem and digital compensation for switchable analog filter to assist echo cancellation in full duplex cable modem
    6.
    发明授权
    Cable modem and digital compensation for switchable analog filter to assist echo cancellation in full duplex cable modem 有权

    公开(公告)号：US11133915B2

    公开(公告)日：2021-09-28

    申请号：US16601611

    申请日：2019-10-15

    申请人： MaxLinear, Inc.

    发明人： Boaz Kol ,  Noam Tal ,  Shaul Shulman ,  Thushara Hewavithana

    IPC分类号： H04L5/14 ,  H04B3/21 ,  H04L27/00 ,  H04L27/148

    摘要： A cable modem supporting full duplex (FDX) operations. The cable modem includes a transmit circuitry configured to process a transmit signal and a receive circuitry configured to process a receive signal. The receive circuitry includes a switchable analog filter configured to filter the receive signal. The switchable analog filter is configurable for different passband frequencies. The receive circuitry also includes a digital compensation filter configured to compensate a difference in frequency response in a specific frequency band due to switching of the switchable analog filter for a different passband frequency. The cable modem also includes an adjacent channel interference (ACI) cancellation filter and an adjacent leakage interference (ALI) cancellation filter. A digital compensation filter is also used in processing the ACI cancellation signal and the ALI cancellation signal to impose or compensate the difference in frequency response due to the switchable analog filter switching.

    Signal processing method and communications chip structure
    7.
    发明授权
    Signal processing method and communications chip structure 有权

    公开(公告)号：US10904054B2

    公开(公告)日：2021-01-26

    申请号：US16750200

    申请日：2020-01-23

    申请人： HUAWEI TECHNOLOGIES CO., LTD.

    发明人： Mingjun Fan ,  Jianhua Zheng ,  Daiping Tang

    IPC分类号： H04L27/148 ,  H04B1/10 ,  H04L25/03

    摘要： This application discloses a communications chip structure, including: a channel selection module, configured to receive an input signal, where the input signal is a signal of a preset narrow bandwidth span or a signal of a preset wide bandwidth span; and a digital baseband module, configured to control the channel selection module to select a first sampling and quantification channel when the input signal is a signal of the preset narrow bandwidth span, or control the channel selection module to select a second sampling and quantification channel when the input signal is a signal of the preset wide bandwidth span. The channel selection module is further configured to send the input signal to the first sampling and quantification channel or the second sampling and quantification channel for sampling and quantification.

    MATCHED-FILTER RADIO RECEIVER
    8.
    发明申请
    MATCHED-FILTER RADIO RECEIVER 审中-公开

    公开(公告)号：US20200351132A1

    公开(公告)日：2020-11-05

    申请号：US16957946

    申请日：2019-01-03

    申请人： Nordic Semiconductor ASA

    发明人： Wei LI ,  Daniel RYAN

    IPC分类号： H04L27/233 ,  H04B1/12 ,  H04L27/00 ,  H04L27/148

    摘要： A digital radio receiver has a matched filter bank of filter modules for receiving phase- or frequency-modulated radio signals. Each module cross-correlates a sampled signal with a respective multi-symbol filter sequence, using a plurality of samples in each symbol period. The matched filter bank calculates first values (zn(1)), for respective symbol periods, of a cross-correlation of the sampled signal with a first complex exponential function defined at sample points over one symbol period, and calculates second values (zn(−1)), for the respective symbol periods, of a cross-correlation of the sampled signal with a second, different, complex exponential function. A set of the filter modules cross-correlates the sampled signal with their respective filter sequences using an algorithm that takes, as input, the first values (zn(1)) for symbol periods at which the respective filter sequence has a first value, and the second values (zn(−1)) for symbol periods at which the filter sequence has a second, different, value.

    SYNCHRONOUSLY-SWITCHED MULTI-INPUT DEMODULATING COMPARATOR
    9.
    发明申请
    SYNCHRONOUSLY-SWITCHED MULTI-INPUT DEMODULATING COMPARATOR 审中-公开

    公开(公告)号：US20200322194A1

    公开(公告)日：2020-10-08

    申请号：US16909529

    申请日：2020-06-23

    申请人： Kandou Labs SA

    发明人： Armin Tajalli

    IPC分类号： H04L27/20 ,  H04L25/02 ,  H04L25/49 ,  H04L27/148 ,  H04L27/26

    摘要： Methods and systems are described for obtaining a set of carrier-modulated symbols of a carrier-modulated codeword, each carrier-modulated symbol received via a respective wire of a plurality of wires of a multi-wire bus, applying each carrier-modulated symbol of the set of carrier-modulated symbols to a corresponding transistor of a set of transistors, the set of transistors further connected to a pair of output nodes according to a sub-channel vector of a plurality of mutually orthogonal sub-channel vectors, recovering a demodulation signal from the carrier-modulated symbols, and generating a demodulated sub-channel data output as a differential voltage on the pair of output nodes based on a linear combination of the set of carrier-modulated symbols by controlling conductivity of the set of transistors according to the demodulation signal.