Combined feedforward filter for a decision feedback equalizer
    11.
    发明授权
    Combined feedforward filter for a decision feedback equalizer 有权
    用于决策反馈均衡器的组合前馈滤波器

    公开(公告)号:US07031414B2

    公开(公告)日:2006-04-18

    申请号:US10322568

    申请日:2002-12-19

    申请人: Feng Ouyang

    发明人: Feng Ouyang

    IPC分类号: H04L25/08 H04L1/00

    CPC分类号: H04L25/03057

    摘要: A method and apparatus for mitigating for inter-symbol interference in a communication system using a multi-rate adaptive decision feedback equalizer (DFE) with a feedforward filter which is a combination of a first feedforward filter (FF1) that performs match filtering and a second feedforward filter (FF2) which runs at a lower sampling rate than first feedforward filter (FF1), thereby, reducing the total the number of computation done at the receiver, and removes ISI and white noise.The present invention also employs a method and apparatus where the initial training is done separately for the first feedforward filter (FF1) and the second feedforward filter (FF2). An approximate solution of the optimal receiver has the first feedforward filter (FF1) maximize the output signal to noise ratio (SNR) which is used to train first feedforward filter (FF1).

    摘要翻译: 一种使用具有前馈滤波器的多速率自适应判决反馈均衡器(DFE)来减轻通信系统中符号间干扰的方法和装置,前馈滤波器是执行匹配滤波的第一前馈滤波器(FF 1)和 第二前馈滤波器(FF 2)以比第一前馈滤波器(FF 1)更低的采样速率运行,从而减少在接收机处完成的计算的总数,并且去除ISI和白噪声。 本发明还采用了对于第一前馈滤波器(FF 1)和第二前馈滤波器(FF 2)单独进行初始训练的方法和装置。 最佳接收机的近似解使第一前馈滤波器(FF 1)最大化用于训练第一前馈滤波器(FF 1)的输出信噪比(SNR)。