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    Synchronously-switched multi-input demodulating comparator
    1.
    发明授权
    Synchronously-switched multi-input demodulating comparator 有权

    公开(公告)号：US11894961B2

    公开(公告)日：2024-02-06

    申请号：US18045713

    申请日：2022-10-11

    申请人： Kandou Labs, S.A.

    发明人： Armin Tajalli

    IPC分类号： H04L27/20 ,  H04L25/02 ,  H04L25/49 ,  H04L27/148 ,  H04L27/26 ,  H04L27/00

    CPC分类号： H04L27/2071 ,  H04L25/0274 ,  H04L25/0292 ,  H04L25/4919 ,  H04L27/148 ,  H04L27/2605 ,  H04L2027/0036 ,  H04L2201/04

    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.

    Band filter for filtering a discrete time series signal
    2.
    发明授权
    Band filter for filtering a discrete time series signal 有权

    公开(公告)号：US11888660B2

    公开(公告)日：2024-01-30

    申请号：US17513153

    申请日：2021-10-28

    申请人： University Corporation for Atmospheric Research

    发明人： John Clark Hubbert

    IPC分类号： H04L27/148

    CPC分类号： H04L27/148

    摘要： A band filter (100, 200) for filtering a discrete time series signal (110) is provided. The band filter (100, 200) includes an input frequency shifter (120, 220) configured to frequency down shift the discrete time series signal (110, 210) to provide a frequency down shifted discrete time series signal (120a, 220a), a regression based zero frequency centered band filter (130, 230) communicatively coupled to the input frequency shifter (120, 220), the regression based zero frequency centered band filter (130. 230) being configured to filter the frequency down shifted discrete time series signal (120a, 220a) to provide a filtered and frequency down shifted discrete time series signal (130a, 230a), and an output frequency shifter (140, 240) communicatively coupled to the regression based zero frequency centered band filter (130, 230), the output frequency shifter (140, 240) being configured to frequency up shift the filtered and frequency down shifted discrete time series signal (130a, 230a).

    Bluetooth signal receiving method and device using improved carrier frequency offset compensation
    6.
    发明授权
    Bluetooth signal receiving method and device using improved carrier frequency offset compensation 有权

    公开(公告)号：US09912503B2

    公开(公告)日：2018-03-06

    申请号：US15390412

    申请日：2016-12-23

    申请人： ABOV SEMICONDUCTOR CO., LTD.

    发明人： Sang Young Chu ,  Ki Tae Moon ,  Suk Kyun Hong

    IPC分类号： H04L27/06 ,  H04L27/148 ,  H04W4/00 ,  H04L27/22

    CPC分类号： H04L27/148 ,  H04L27/0014 ,  H04L27/144 ,  H04L27/22 ,  H04W4/80

    摘要： Disclosed herein are a Bluetooth signal receiving device and method. The Bluetooth signal receiving device includes a frequency shift demodulator circuit, a sampler circuit, a training bit pattern discriminator circuit, and a frequency offset compensation circuit. The frequency shift demodulator circuit generates a baseband signal by performing frequency shift demodulation on a received signal, and generates a frequency proportion signal having a value proportional to the frequency of the baseband signal. The sampler circuit generates a plurality of series of bit streams from the frequency proportion signal. The training bit pattern discriminator circuit determines whether the plurality of series of bit streams generated by the sampler circuit satisfies a training bit pattern condition. The frequency offset compensation circuit compensates the frequency proportion signal by using a measured error metric as a effective error metric when the plurality of series of bit streams satisfies the training bit pattern condition.

    Drift robust non-coherent demodulation scheme
    7.
    发明授权
    Drift robust non-coherent demodulation scheme 有权

    公开(公告)号：US09860095B1

    公开(公告)日：2018-01-02

    申请号：US15196275

    申请日：2016-06-29

    申请人： Apple Inc.

    发明人： Yuval Avner

    IPC分类号： H04L27/148 ,  H04W4/00 ,  H04L27/22

    CPC分类号： H04L27/148 ,  H04L27/22 ,  H04W4/80

    摘要： This document describes techniques for performing non-coherent demodulation of a differentially modulated signal in a drift robust manner. A differentially modulated signal, including a plurality of symbols, may be received. Non-coherent domodulation of the differentially modulated signal may be performed. The non-coherent demodulation may include performing noise prediction using a high-pass filtered estimated error signal associated with the differentially modulated signal. In some embodiments, frequency offset estimation to reduce frequency offset of the differentially modulated signal may also be performed as part of the non-coherent demodulation.