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33 条记录 (耗时 0.02 秒)

    Noise analysis in a communication system
    6.
    发明授权
    Noise analysis in a communication system 有权
    通信系统中的噪声分析

    公开(公告)号：US07492703B2

    公开(公告)日：2009-02-17

    申请号：US10273561

    申请日：2002-10-18

    申请人： Itay Lusky ,  Daniel Wajcer ,  Yosef Bendel ,  Yigal Bitran ,  Naftali Sommer ,  Ofir Shalvi ,  Zvi Reznic ,  Ariel Yagil ,  Ran Senderovitz ,  Eli Haim

    发明人： Itay Lusky ,  Daniel Wajcer ,  Yosef Bendel ,  Yigal Bitran ,  Naftali Sommer ,  Ofir Shalvi ,  Zvi Reznic ,  Ariel Yagil ,  Ran Senderovitz ,  Eli Haim

    IPC分类号： H04J11/00

    CPC分类号： H04L1/20 ,  H04L1/0001 ,  H04L1/0003

    摘要： A system is provided to automatically estimate performance of a receiver for receiving input signals, the input signals having a carrier frequency and a baud rate, from a channel in a communication system and the effect of highly correlated noise cancellation on performance of the receiver, while no active transmission is occurring on the channel, comprising: a digital front end in the receiver for receiving samples of the input signals; a predictor coupled to the digital front end for predicting highly correlated noise in a second sample of the input signal; and a subtraction unit coupled to the predictor for subtracting the predictor output from the second sample to determine residual noise in the second sample. Other systems and methods are disclosed.

    摘要翻译： 提供一种系统，用于自动估计用于从通信系统中的信道接收输入信号，输入信号具有载波频率和波特率的接收机的性能以及高度相关的噪声消除对接收机性能的影响，同时 在频道上没有发生主动传输，包括：接收机中的数字前端，用于接收输入信号的采样; 耦合到所述数字前端的预测器，用于预测所述输入信号的第二样本中的高度相关噪声; 以及减法单元，耦合到所述预测器，用于从所述第二样本减去所述预测器输出，以确定所述第二样本中的残余噪声。 公开了其它系统和方法。

    Constellation selection in a communication system
    7.
    发明授权
    Constellation selection in a communication system 有权
    通讯系统中的星座选择

    公开(公告)号：US07274735B2

    公开(公告)日：2007-09-25

    申请号：US10273558

    申请日：2002-10-18

    申请人： Itay Lusky ,  Daniel Wajcer ,  Yosef Bendel ,  Yigal Bitran ,  Naftali Sommer ,  Ofir Shalvi ,  Zvi Reznic ,  Ariel Yagil ,  Eli Haim

    发明人： Itay Lusky ,  Daniel Wajcer ,  Yosef Bendel ,  Yigal Bitran ,  Naftali Sommer ,  Ofir Shalvi ,  Zvi Reznic ,  Ariel Yagil ,  Eli Haim

    IPC分类号： H04B3/46

    CPC分类号： H04L1/20 ,  H04L1/0001 ,  H04L1/0003 ,  H04L1/0017 ,  H04L1/0019

    摘要： A method is provided to provide data to automatically estimate channel performance in a communication system if a different order constellation is used comprising the steps of: receiving an input signal from the channel; passing the input signal to a slicer having an output signal; determining signal noise by taking the difference between the input signal and output signal; identifying a beginning of a noise event when the signal noise is greater than a predefined first threshold; identifying an end of a noise event when the signal noise is less than a predefined second threshold; and providing for output the beginning of the noise event and the end of the noise event. Other systems and methods are disclosed.

    摘要翻译： 提供一种提供数据以自动估计通信系统中的信道性能的方法，如果使用不同的订单星座包括以下步骤：从信道接收输入信号; 将输入信号传递到具有输出信号的限幅器; 通过取输入信号和输出信号之差来确定信号噪声; 当信号噪声大于预定义的第一阈值时，识别噪声事件的开始; 当信号噪声小于预定义的第二阈值时，识别噪声事件的结束; 并提供输出噪声事件的开始和噪声事件的结束。 公开了其它系统和方法。

    Method for upstream CATV coded modulation
    9.
    发明授权
    Method for upstream CATV coded modulation 有权
    上游CATV编码调制方法

    公开(公告)号：US07545890B1

    公开(公告)日：2009-06-09

    申请号：US09493526

    申请日：2000-01-28

    申请人： Ofir Shalvi ,  Itay Lusky ,  Ariel Yagil

    发明人： Ofir Shalvi ,  Itay Lusky ,  Ariel Yagil

    IPC分类号： H04L27/06

    CPC分类号： H04L1/0041 ,  H04L1/0057 ,  H04L1/006 ,  H04L1/0065 ,  H04L1/0069 ,  H04L1/0071 ,  H04L27/3405

    摘要： The present invention provides an encoding method and a class of decoding methods that provide methods for high throughput and high robustness digital communications over channels that are contaminated by impulse noise, as well as white and colored additive noise (noise that is characterized by heavy-tailed distribution), phase noise and signal fading.

    摘要翻译： 本发明提供了一种编码方法和一类解码方法，其提供了在被脉冲噪声污染的信道上的高吞吐量和高鲁棒性数字通信的方法，以及白色和彩色加性噪声（以粗尾为特征的噪声 分布），相位噪声和信号衰落。

    Efficient decoding of spatially-multiplexed signals
    10.
    发明授权
    Efficient decoding of spatially-multiplexed signals 有权
    空间复用信号的有效解码

    公开(公告)号：US08194801B1

    公开(公告)日：2012-06-05

    申请号：US13237942

    申请日：2011-09-21

    申请人： Yigal Bitran ,  Itay Lusky ,  Ariel Yagil

    发明人： Yigal Bitran ,  Itay Lusky ,  Ariel Yagil

    IPC分类号： H04L27/06

    CPC分类号： H04L5/0023 ,  H04L27/22

    摘要： A method for communication includes receiving a spatially-multiplexed signal using multiple receivers to produce multiple respective received signals. The spatially-multiplexed signal includes multiple simultaneously-transmitted symbols, which are selected from respective sets of constellation symbols, each constellation symbol representing a respective set of values of a group of data bits.Combinations of the constellation symbols are traversed iteratively. Each combination includes one constellation symbol from each of the sets of the constellation symbols and represents N data bits. The traversed combinations are searched for a combination that matches the received signals.During traversal of the combinations, at least 2N measures of likelihood regarding the values of the data bits represented by each traversed combination are accumulated. The accumulated measures of likelihood are processed to produce soft bit metrics. The values of the data bits carried by the multiple transmitted symbols are reconstructed responsively to the soft bit metrics.

    摘要翻译： 一种通信方法包括使用多个接收机接收空间复用信号以产生多个相应的接收信号。 空间复用信号包括从相应组的星座符号中选择的多个同时发送的符号，每个星座符号表示一组数据比特的相应的一组值。 星座符号的组合被迭代地遍历。 每个组合包括来自星座符号集合中的每一组的一个星座符号，并且表示N个数据比特。 搜索所遍历的组合以获得与接收到的信号相匹配的组合。 在组合遍历期间，累积关于由每个遍历组合表示的数据位的值的至少2N次可能性测量。 处理可能性的累积度量以产生软比特度量。 响应于软比特度量重建由多个发送的符号携带的数据比特的值。