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    Signal sending device, signal receiving device, symbol timing synchronization method, and system
    2.
    发明授权
    Signal sending device, signal receiving device, symbol timing synchronization method, and system 有权

    公开(公告)号：US11736267B2

    公开(公告)日：2023-08-22

    申请号：US16892691

    申请日：2020-06-04

    申请人： HUAWEI TECHNOLOGIES CO., LTD.

    发明人： Tong Ji ,  Yiling Wu ,  Guangwei Yu ,  Robert William Young ,  Brian Martin Gaffney

    IPC分类号： H04L7/04 ,  H04J11/00 ,  H04J13/00 ,  H04W56/00 ,  H04L27/26 ,  H04W4/70

    CPC分类号： H04L7/041 ,  H04J11/0069 ,  H04J13/0062 ,  H04L27/2662 ,  H04L27/2663 ,  H04W56/00 ,  H04W56/001 ,  H04L27/2657 ,  H04L27/2671 ,  H04W4/70

    摘要： The present disclosure relates to the field of wireless communications technologies, relates to a signal sending device, a signal receiving device, a symbol timing synchronization method, and a system, and resolves a problem that complexity of symbol timing synchronization performed by a terminal with relatively low crystal oscillator accuracy is high. In a receiving device, a receiving module receives a synchronization signal including a first signal and a second signal. The first signal includes N1 generalized ZC sequences, and the second signal includes N2 generalized ZC sequences. The second signal is used to distinguish different cells or different cell groups. There are at least two generalized ZC sequences with different root indexes in (N1+N2) generalized ZC sequences. A processing module performs a first sliding correlation operation and a second sliding correlation operation on the synchronization signal, and performs symbol timing synchronization according to a relationship between a sliding correlation peak generated when a sliding correlation is performed on the N1 generalized ZC sequences and a sliding correlation peak generated when a sliding correlation is performed on the N2 generalized ZC sequences. This has relatively low implementation complexity, compared with an existing method in which grid search should be performed multiple times to compensate for a relatively large phase rotation.

    LEVERAGING SECONDARY SYNCHRONIZATION SIGNAL PROPERTIES TO IMPROVE SYNCHRONIZATION SIGNAL DETECTION
    4.
    发明申请
    LEVERAGING SECONDARY SYNCHRONIZATION SIGNAL PROPERTIES TO IMPROVE SYNCHRONIZATION SIGNAL DETECTION 审中-公开

    公开(公告)号：US20180176003A1

    公开(公告)日：2018-06-21

    申请号：US15385879

    申请日：2016-12-21

    申请人： Intel IP Corporation

    发明人： Matthew Hayes

    IPC分类号： H04L7/04 ,  H04L7/00 ,  H04L27/18

    CPC分类号： H04L27/26 ,  H04B7/0848 ,  H04B7/0885 ,  H04L25/0204 ,  H04L25/0224 ,  H04L27/18 ,  H04L27/2663 ,  H04L27/2671

    摘要： Disclosed is a method of synchronization signal correlation, comprising receiving a synchronization signal (“SS”) on a plurality of receive antennas; performing a signal revision on the SS received on a first receive antenna, the signal revision comprising performing an element-wise squaring of the SS; calculating a complex coefficient by summing the element-wise squared SS; estimating a phase angle of the complex coefficient; and performing an element-wise phase correction of the SS; the method synchronization signal correlation further comprising performing the signal revision on the SS received on a second receive antenna; conditioning the revised signals by constructively and destructively combining the revised signals; selecting an optimized conditioned signal, wherein the optimized conditioned signal is the constructive or destructive combination with the largest Euclidian norm; correlating the optimized conditioned signal with a series of candidate SSs; and selecting the correlation with the largest magnitude as a transmitted SS.

    Method and apparatus for improved Schmidl-Cox-based signal detection
    8.
    发明授权
    Method and apparatus for improved Schmidl-Cox-based signal detection 有权

    公开(公告)号：US09854552B2

    公开(公告)日：2017-12-26

    申请号：US14740425

    申请日：2015-06-16

    申请人： NATIONAL INSTRUMENTS CORPORATION

    发明人： Max Koehler ,  Achim Nahler ,  Amal Ekbal

    IPC分类号： H04B17/00 ,  H04W56/00 ,  H04L27/26

    CPC分类号： H04W56/0035 ,  H04L27/2663 ,  H04L27/2671 ,  H04L27/2675 ,  H04L27/2688

    摘要： Techniques are disclosed relating to detection of wireless signals. In some embodiments, a method includes generating an autocorrelation result for a training field in a received wireless message, generating differentiation information based on the autocorrelation result, and determining that one or more signal recognition criteria are met. In some embodiments, the signal recognition criteria include a first criterion that a first peak in the differentiation information satisfies a first threshold for at least a first time interval. In some embodiments, the signal recognition criteria include one or more additional criteria, including a second criterion that a second peak in the differentiation information satisfies a second threshold for at least a second time interval, wherein the first and second peaks have different polarities and/or a third criterion that the first peak corresponds to an autocorrelation result value that is below a particular autocorrelation threshold.