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    FREQUENCY DEPENDENT RESIDUAL SIDE BAND CORRECTION
    7.
    发明公开
    FREQUENCY DEPENDENT RESIDUAL SIDE BAND CORRECTION 审中-公开

    公开(公告)号：US20240080230A1

    公开(公告)日：2024-03-07

    申请号：US17930403

    申请日：2022-09-07

    申请人： QUALCOMM Incorporated

    发明人： Ronen SHAKED ,  Gideon Shlomo KUTZ

    IPC分类号： H04L27/04 ,  H04L5/00 ,  H04L25/03

    CPC分类号： H04L27/04 ,  H04L5/0098 ,  H04L25/03006 ,  H04L2025/03815

    摘要： A network node may transmit a training signal for a UE on a plurality of sub-carriers, the training signal transmitted via multiple IQ modulators and multiple RF antenna panels and receive a feedback associated with an FDRSB based on the training signal. The network node may apply an FDRSB correction filter to at least one signal to be transmitted to the UE, and the FDRSB correction filter may be based on the feedback received from the UE. The training signal may include at least one tone transmitted on a first subset of sub-carriers of the plurality of sub-carriers, the first subset of sub-carriers being configured symmetric to a second subset of sub-carriers with respect to a center frequency of the plurality of sub-carriers, and the second subset of sub-carriers being free of the at least one tone of the training signal.

    ASK Modulation & Demodulation System
    9.
    发明公开
    ASK Modulation & Demodulation System 审中-公开

    公开(公告)号：US20240006918A1

    公开(公告)日：2024-01-04

    申请号：US17853575

    申请日：2022-06-29

    申请人： Halo Microelectronics International

    发明人： Rui Liu ,  Lijie Zhao ,  Feng Zhou

    IPC分类号： H02J50/12 ,  H04B5/00 ,  H02M1/00 ,  H04L27/04

    CPC分类号： H02J50/12 ,  H04B5/0037 ,  H04L27/04 ,  H02M1/0025 ,  H04B5/0075

    摘要： In an embodiment method, an envelope voltage of a resonant capacitor of a wireless power receiver in a wireless charging system may be detected at an output node. One or more parameters of the wireless power receiver may be adjusted in order keep the envelope voltage within a pre-determined voltage range. The one or more parameters includes a capacitance across a receiving coil and the resonant capacitor, or a current of a sub-circuit connected between the output node and a ground. An amplitude shift keying (ASK) carrier signal may be detected at a wireless power transmitter of the wireless charging system and attenuated. A demodulated ASK signal may be generated from the attenuated ASK carrier signal based on peak values of the attenuated ASK carrier signal and a zero-crossing signal generated from the attenuated ASK carrier signal.

    Electromagnetic wave transmission apparatus and electromagnetic wave communication system
    10.
    发明授权
    Electromagnetic wave transmission apparatus and electromagnetic wave communication system 有权

    公开(公告)号：US11848804B2

    公开(公告)日：2023-12-19

    申请号：US17420972

    申请日：2020-01-06

    申请人： PIONEER CORPORATION

    发明人： Hideki Kobayashi

    IPC分类号： H04L27/04 ,  H03B7/06 ,  H04B1/04

    CPC分类号： H04L27/04 ,  H03B7/06 ,  H04B1/04

    摘要： An electromagnetic wave transmission apparatus of the present invention includes a transmission unit whose voltage-current characteristics have a local maximum value and a local minimum value located on a higher voltage side than the local maximum value and which transmits an electromagnetic wave indicating a modulation signal, an acquisition unit which acquires a digital signal, and a modulation unit which modulates the digital signal into the modulation signal which is a signal using voltage values of three levels or more in an oscillation region which is a voltage region that is equal to or more than a voltage of the local maximum voltage and equal to or less than a voltage of the local minimum voltage. The transmission unit preferably transmits a synchronization signal as at least a part of the modulation signal. In this case, the synchronization signal preferably includes a maximum value and a minimum value among the voltage values of three levels or more, and includes a pattern in which the voltage value transitions from one of the maximum value and the minimum value to the other.