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    Correlation using only selected chip position samples in a wireless communication system
    6.
    发明授权
    Correlation using only selected chip position samples in a wireless communication system 有权
    在无线通信系统中仅使用选定的码片位置样本的相关性

    公开(公告)号：US06996162B1

    公开(公告)日：2006-02-07

    申请号：US09679487

    申请日：2000-10-04

    申请人： Srinath Hosur ,  Sundararajan Sriram ,  Anand G. Dabak ,  Alan Gatherer

    发明人： Srinath Hosur ,  Sundararajan Sriram ,  Anand G. Dabak ,  Alan Gatherer

    IPC分类号： H04B1/69 ,  H04L7/00

    CPC分类号： H04B1/7077 ,  H04B1/70755 ,  H04B1/7083

    摘要： A method (70) of operating a wireless receiver (UST). The method receives a wireless communicated signal, wherein the signal comprises a first synchronization channel component. The method also correlates a synchronization channel value (PSC) to the signal to produce a plurality of correlation samples in response to a correlation between the synchronization channel value and the signal. Further, the method compares (72) the plurality of correlation samples to a threshold (τ) and stores as a first set of correlation samples selected ones of the plurality of correlation samples that exceed the threshold and are within a first time sample period, wherein each of the correlation samples in the first set has a corresponding sample time relative to the first time sample period. Finally, the method combines (74) a second set of correlation samples with the first set of correlation samples.

    摘要翻译： 一种操作无线接收机（UST）的方法（70）。 该方法接收无线通信信号，其中信号包括第一同步信道分量。 该方法还将同步信道值（PSC）与信号相关联，以响应于同步信道值和信号之间的相关性而产生多个相关样本。 此外，该方法将（72）多个相关采样与阈值（τ）进行比较，并且存储作为超过阈值并且在第一时间采样周期内的多个相关样本中选择的一个相关样本的第一组相关样本，其中 第一组中的每个相关样本具有相对于第一时间采样周期的相应采样时间。 最后，该方法将第二组相关样本与第一组相关样本组合（74）。

    Wireless communications system with combining of multiple paths selected from sub-windows in response to the primary synchronization channel
    7.
    发明授权
    Wireless communications system with combining of multiple paths selected from sub-windows in response to the primary synchronization channel 有权
    无线通信系统，其响应于主同步信道组合从子窗口选择的多个路径

    公开(公告)号：US06831956B1

    公开(公告)日：2004-12-14

    申请号：US09669813

    申请日：2000-09-26

    申请人： Timothy M. Schmidl ,  Alan Gatherer ,  Srinath Hosur ,  Anand G. Dabak

    发明人： Timothy M. Schmidl ,  Alan Gatherer ,  Srinath Hosur ,  Anand G. Dabak

    IPC分类号： H04B1707

    CPC分类号： H04B1/7113

    摘要： A wireless receiver (UST). The receiver comprises at least one antenna (ATU) for receiving a plurality of frames (FR) in a form of a plurality of paths. Each of the plurality of frames comprises a plurality of time slots (SLN), and each of the plurality of time slots comprises a plurality of symbols. Further, each of the plurality of paths has a corresponding sample position, wherein the plurality of symbols comprise a primary synchronization code symbol (PSC). The receiver further comprises circuitry (52) for correlating a primary synchronization code across a group of the plurality of symbols and circuitry (52) for identifying a plurality of path positions within the group. Each of the plurality of path positions corresponds to a respective one of a plurality of largest-amplitude paths represented within the group as detected in response to the circuitry for correlating. The receiver further comprises circuitry (56) for defining a plurality of sub-windows. Each of the plurality of sub-windows comprises a plurality of sample positions, and each of the plurality of sub-windows includes at least one of the plurality of identified path positions. Finally, the receiver further comprises circuitry (54, 58) for combining paths selected from the sample positions within the plurality of sub-windows.

    摘要翻译： 无线接收器（UST）。 接收机包括用于接收多个路径形式的多个帧（FR）的至少一个天线（ATU）。 多个帧中的每一个包括多个时隙（SLN），并且多个时隙中的每一个包括多个符号。 此外，多个路径中的每一个具有对应的采样位置，其中多个符号包括主同步码符号（PSC）。 接收机还包括电路（52），用于在一组多个符号和电路（52）之间相互关联主同步码，用于识别组内的多个路径位置。 多个路径位置中的每一个对应于响应于用于相关的电路检测到的在组内表示的多个最大幅度路径中的相应一个路径位置。 接收器还包括用于限定多个子窗口的电路（56）。 多个子窗口中的每一个包括多个采样位置，并且多个子窗口中的每一个子窗口包括多个识别的路径位置中的至少一个。 最后，接收机还包括用于组合从多个子窗口内的样本位置选择的路径的电路（54,58）。

    Efficient implementation of error approximation in blind equalization of data communications
    8.
    发明授权
    Efficient implementation of error approximation in blind equalization of data communications 有权
    数据通信盲均衡中误差近似的有效实现

    公开(公告)号：US06370191B1

    公开(公告)日：2002-04-09

    申请号：US09431687

    申请日：1999-11-01

    申请人： Shivaling S. Mahant-Shetti ,  Srinath Hosur ,  Alan Gatherer

    发明人： Shivaling S. Mahant-Shetti ,  Srinath Hosur ,  Alan Gatherer

    IPC分类号： H04L2710

    CPC分类号： G06F7/552 ,  G06F2207/5525 ,  H04L25/0307 ,  H04L2025/03401 ,  H04L2025/03477 ,  H04L2025/0349 ,  H04L2025/03573 ,  H04L2025/0363

    摘要： A cable modem (20) having a blind equalizer (40) in its equalization function (28) is disclosed. The blind equalizer (40) includes an adaptive equalizer (44) and an approximating update function (42) that provides updated equalization coefficients to the adaptive equalizer (44) using the Constant Modulus Algorithm, wherein the error in the adaptive equalizer output is estimated. The estimates are based upon a determination of the maximum and minimum of the real and i components of symbols output by the adaptive equalizer (44). Efficiency in the computations required for updating the equalizer coefficients is obtained, without sacrificing convergence.

    摘要翻译： 公开了一种在其均衡功能（28）中具有盲均衡器（40）的电缆调制解调器（20）。 盲均衡器（40）包括使用恒模算法向自适应均衡器（44）提供更新的均衡系数的自适应均衡器（44）和近似更新功能（42），其中估计自适应均衡器输出中的误差。 估计基于由自适应均衡器（44）输出的符号的真实和i分量的最大值和最小值的确定。 获得更新均衡器系数所需的计算的效率，而不会牺牲收敛。

    Spread spectrum multipath combination
    9.
    发明授权
    Spread spectrum multipath combination 有权
    扩频多径组合

    公开(公告)号：US07457381B1

    公开(公告)日：2008-11-25

    申请号：US09659431

    申请日：2000-09-08

    申请人： Srinath Hosur ,  Alan Gatherer ,  Eko N. Onggosanusi

    发明人： Srinath Hosur ,  Alan Gatherer ,  Eko N. Onggosanusi

    IPC分类号： H04B7/10 ,  H04L1/02

    CPC分类号： H04B7/0857

    摘要： Multipath relative channel estimations for weighting maximal ratio combining of RAKE detectors in wireless communication systems uses maximal eigenvectors of covariance matrices of path signals. Estimates for close-in and outlying sets of symbols provides linear time change channel estimation.

    摘要翻译： 无线通信系统中RAKE检测器加权最大比组合的多路径相对信道估计使用路径信号的协方差矩阵的最大特征向量。 近似和偏离的符号组的估计提供线性时变信道估计。

    Wireless communications system with combining of multiple paths selected from correlation to the primary synchronization channel
    10.
    发明授权
    Wireless communications system with combining of multiple paths selected from correlation to the primary synchronization channel 有权
    无线通信系统，具有从与主同步信道相关选择的多个路径的组合

    公开(公告)号：US06829290B1

    公开(公告)日：2004-12-07

    申请号：US09669394

    申请日：2000-09-26

    申请人： Timothy M. Schmidl ,  Alan Gatherer ,  Srinath Hosur ,  Anand G. Dabak

    发明人： Timothy M. Schmidl ,  Alan Gatherer ,  Srinath Hosur ,  Anand G. Dabak

    IPC分类号： H04B169

    CPC分类号： H04B1/7115 ,  H04B1/709 ,  H04B1/7117 ,  H04B2201/70707

    摘要： A wireless receiver (UST). The receiver comprises at least one antenna (ATU) for receiving a plurality of frames (FR) in a form of a plurality of paths. Each of the plurality of frames comprises a plurality of time slots (SLN), and each of the plurality of time slots comprises a plurality of symbols. Further, each of the plurality of paths has a corresponding sample position, wherein the plurality of symbols comprise a primary synchronization code symbol (PSC). The receiver further comprises circuitry (52) for correlating a primary synchronization code across a group of the plurality of symbols, and circuitry for identifying a plurality of path positions within the group. Each of the plurality of path positions corresponds to a respective one of a plurality of largest-amplitude paths represented within the group as detected in response to the circuitry for correlating. Finally, the receiver comprises circuitry for combining (54, 58) the plurality of largest-amplitude paths in response to identification of those paths by the circuitry for identifying.

    摘要翻译： 无线接收器（UST）。 接收机包括用于接收多个路径形式的多个帧（FR）的至少一个天线（ATU）。 多个帧中的每一个包括多个时隙（SLN），并且多个时隙中的每一个包括多个符号。 此外，多个路径中的每一个具有对应的采样位置，其中多个符号包括主同步码符号（PSC）。 接收机还包括用于将多个符号组中的主同步码相互关联的电路（52）以及用于识别组内的多个路径位置的电路​​。 多个路径位置中的每一个对应于响应于用于相关的电路检测到的在组内表示的多个最大幅度路径中的相应一个路径位置。 最后，接收机包括用于响应于用于识别的电路的那些路径的识别来组合（54,58）多个最大幅度路径的电路。