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    Carrier recovery and doppler frequency estimation
    1.
    发明授权
    Carrier recovery and doppler frequency estimation 有权
    载波恢复和多普勒频率估计

    公开(公告)号：US06532271B1

    公开(公告)日：2003-03-11

    申请号：US09430372

    申请日：1999-10-29

    申请人： Syang-Myau Hwang ,  Lin Yang ,  Mao Yu ,  Gibong Jeong

    发明人： Syang-Myau Hwang ,  Lin Yang ,  Mao Yu ,  Gibong Jeong

    IPC分类号： H04L2722

    CPC分类号： H04L27/2278 ,  H04L2027/0065 ,  H04L2027/0081

    摘要： Method and system for carrier recovery and estimation of Doppler shift from a signal source that is moving relative to a signal receiver. A pure carrier preamble for the received signal is processed through each of two stages of a linear predictor to obtain a successively more accurate estimation of a Doppler frequency offset for the carrier. The received signal is downconverted by each stage estimation of the Doppler frequency offset, and the downconverted signal is processed through a decision feedback phase locked loop to provide a signal in which substantially all of the Doppler offset and/or phase angle are identified and removed. The system has low complexity, is fast, and is accurate to within an estimated few tens of Hertz and will work with signals having relatively low signal-to-noise ratios. The invention is useful for receipt of signals from satellites in low earth orbits (LEOs) and other non-geosynchronous orbits, and wherever a transmitter and receiver are moving relative to each other.

    摘要翻译： 用于载波恢复和从相对于信号接收机移动的信号源估计多普勒频移的方法和系统。 通过线性预测器的两个级中的每一级处理接收信号的纯载波前导码，以获得载波的多普勒频偏的连续更准确的估计。 接收到的信号通过多普勒频率偏移的每个级估计进行下变频，并且通过判决反馈锁相环处理下变频信号，以提供其中基本上全部多普勒偏移和/或相位角被识别和去除的信号。 该系统的复杂度低，速度快，准确度达到几十赫兹，并且能够处理信噪比相对较低的信号。 本发明对于从低地球轨道（LEO）和其他非地球同步轨道中的卫星以及发射机和接收机相对于彼此移动的任何地方接收信号是有用的。

    TRAINING OF THE NON-UPDATED DECISION FEEDBACK EQUALIZER FOR A 8-VSB RECEIVER
    4.
    发明申请
    TRAINING OF THE NON-UPDATED DECISION FEEDBACK EQUALIZER FOR A 8-VSB RECEIVER 审中-公开
    针对8-VSB接收机的非更新决策反馈均衡器的培训

    公开(公告)号：US20100080275A1

    公开(公告)日：2010-04-01

    申请号：US12239794

    申请日：2008-09-28

    申请人： Lin Yang ,  Jun Lu ,  Shue-Lee Chang ,  Jing Li ,  Syang-Myau Hwang

    发明人： Lin Yang ,  Jun Lu ,  Shue-Lee Chang ,  Jing Li ,  Syang-Myau Hwang

    IPC分类号： H03H7/30 ,  H03H7/40

    CPC分类号： H04L25/03146 ,  H04L25/0202 ,  H04L27/02 ,  H04L2025/03477 ,  H04L2025/0349

    摘要： A method for training of a non-updated decision feedback equalizer is provided. The method comprising the steps of: providing a sequence of frames adapted to be received by a receiver; provide a sequence of synchronization frames interposed between a predetermined number of frames; and using at least part of the sequence of synchronization frames to train a decision feedback equalizer (DFE), thereby speeding up system convergence or making system convergence possible.

    摘要翻译： 提供了一种用于训练未更新的判决反馈均衡器的方法。 该方法包括以下步骤：提供适于由接收机接收的帧序列; 提供插入在预定数量帧之间的同步帧序列; 并且使用同步帧序列的至少一部分来训练判决反馈均衡器（DFE），从而加速系统收敛或使系统收敛成为可能。

    Method and device used in wireless communication node
    9.
    发明授权
    Method and device used in wireless communication node 有权

    公开(公告)号：US12063183B2

    公开(公告)日：2024-08-13

    申请号：US18241898

    申请日：2023-09-04

    申请人： Qi Jiang ,  Xiaobo Zhang ,  Lin Yang

    发明人： Qi Jiang ,  Xiaobo Zhang ,  Lin Yang

    IPC分类号： H04L5/00 ,  H04W72/0453 ,  H04W76/14 ,  H04W76/15

    CPC分类号： H04L5/0098 ,  H04W72/0453 ,  H04W76/14 ,  H04W76/15

    摘要： The disclosure provides a method and device used in wireless communication node. A first node receives K candidate radio signal(s), and receives a first radio signal, the first radio signal being associated to a first identifier; the K candidate radio signal(s) is(are) associated to K first-type identifier(s) respectively, and only K1 first-type identifier(s) among the K first-type identifier(s) is(are) equal to the first identifier; the K1 first-type identifier(s) is(are) associated to K1 candidate radio signal(s) among the K candidate radio signal(s) respectively; only the K1 candidate radio signal(s) among the K candidate radio signal(s) can be used for controlling a receiving power of the first radio signal; the K is a positive integer. The disclosure simplifies the AGC process on terminal side through designing K first-type identifiers, which is suitable for application scenarios with multiple subcarrier spacings on sidelink, thereby improving the overall performance of the system.

    Method and device in communication node for wireless communication
    10.
    发明授权
    Method and device in communication node for wireless communication 有权

    公开(公告)号：US11979750B2

    公开(公告)日：2024-05-07

    申请号：US18195945

    申请日：2023-05-11

    申请人： Zheng Liu ,  Xiaobo Zhang ,  Lin Yang

    发明人： Zheng Liu ,  Xiaobo Zhang ,  Lin Yang

    IPC分类号： H04W16/14 ,  H04L5/00 ,  H04L27/26 ,  H04W72/0446

    CPC分类号： H04W16/14 ,  H04L5/0082 ,  H04L5/0094 ,  H04L27/2607 ,  H04W72/0446

    摘要： The disclosure discloses a method and device in a communication node for wireless communication. The communication node receives first information, and performs Q energy detections respectively in Q time sub-pools within a first sub-band, and if energy detected by each energy detection of the Q energy detections is lower than a first threshold, starts to transmit a first radio signal at a first time-instant; the first information is used to determine K candidate time-instant subsets; a target time-instant subset is one of the K candidate time-instant subsets, the first time-instant belongs to the target time-instant subset; a frequency-domain bandwidth of the first sub-band is used to determine the target time-instant subset out of the K candidate time-instant subsets, and frequency-domain resources occupied by the first radio signal belong to the first sub-band. The disclosure can improve access fairness.