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    ADAPTIVE DESPREADER
    1.
    发明申请
    ADAPTIVE DESPREADER 审中-公开
    自适应解决方案

    公开(公告)号：WO1997005709A1

    公开(公告)日：1997-02-13

    申请号：PCT/US1996012531

    申请日：1996-07-31

    Applicant: QUALCOMM INCORPORATED

    Inventor： QUALCOMM INCORPORATED ,  ROSS, Arthur

    IPC: H04B01/707

    CPC classification number: H04B1/7097 ,  H04L25/03038 ,  H04L2025/03375 ,  H04L2025/03477 ,  H04L2025/03617

    Abstract: A method and apparatus for adaptively despreading a direct sequence spread spectrum signal. The direct sequence spread spectrum signal is provided to transversal filter (101). The output of filter (101) is despread by despreader (120) to provide a soft symbol determined by symbol estimator (122). The soft symbol is provided to decision circuit (124) which generates an error corrected version of the soft symbol data, referred to as a hard symbol. The value of the hard symbol is subtracted from the soft symbol by subtractor (126) to generate an error symbol. The error symbol is then used to compute tap values of the transversal filter by means of an LMS algorithm employed by tap adapter (103).

    Abstract translation: 一种用于自适应地解扩直接序列扩频信号的方法和装置。 直接序列扩频信号被提供给横向滤波器（101）。 滤波器（101）的输出由解扩器（120）解扩，以提供由符号估计器（122）确定的软符号。 软符号被提供给判定电路（124），该电路产生称为硬符号的软符号数据的纠错版本。 通过减法器（126）从软符号中减去硬符号的值以产生错误符号。 然后使用误差符号通过抽头适配器（103）采用的LMS算法来计算横向滤波器的抽头值。

    ADAPTIVE DESPREADER
    2.
    发明公开
    ADAPTIVE DESPREADER 失效
    自适应解扩器

    公开(公告)号：EP0842568A1

    公开(公告)日：1998-05-20

    申请号：EP96927283.0

    申请日：1996-07-31

    Applicant: QUALCOMM INCORPORATED

    Inventor： ROSS, Arthur

    IPC: H03H15 ,  H03H21 ,  H04B1 ,  H04L25

    CPC classification number: H04B1/7097 ,  H04L25/03038 ,  H04L2025/03375 ,  H04L2025/03477 ,  H04L2025/03617

    Abstract: A method and apparatus for adaptively despreading a direct sequence spread spectrum signal. The direct sequence spread spectrum signal is provided to transversal filter (101). The output of filter (101) is despread by despreader (120) to provide a soft symbol determined by symbol estimator (122). The soft symbol is provided to decision circuit (124) which generates an error corrected version of the soft symbol data, referred to as a hard symbol. The value of the hard symbol is subtracted from the soft symbol by subtractor (126) to generate an error symbol. The error symbol is then used to compute tap values of the transversal filter by means of an LMS algorithm employed by tap adapter (103).

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