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1. 发明授权

US06940830B2 Method and apparatus for echo cancellation 有权
标题翻译：用于回波消除的方法和装置
公开(公告)号：US06940830B2
公开(公告)日：2005-09-06
申请号：US09849606
申请日：2001-02-28
申请人： Steven R Blackwell , Richard L. Goodson
发明人： Steven R Blackwell , Richard L. Goodson
IPC分类号： H04B3/23 , H04B3/20
CPC分类号： H04B3/23
摘要： The present invention relates to an improved method and apparatus for echo cancellation in a communication system utilizing a bidirectional transmission medium. The invention significantly reduces computational overhead associated with echo cancellation by using sub-Nyquist sampling in the echo path. In particular, the invention relates to a method and apparatus for echo cancellation in a communication system utilizing different signaling or baud rates in the transmit and receive directions, whereby the computational overhead of the echo cancellation is significantly reduced as compared to traditional methods. In a preferred embodiment herein, the present invention reduces by one-half the computational overhead associated with echo cancellation in a data communications system utilizing symmetrical information rates at asymmetrical signal rates.
摘要翻译：本发明涉及利用双向传输介质的通信系统中的回波消除的改进方法和装置。本发明通过在回波路径中使用子奈奎斯特采样来显着地减少与回波消除相关的计算开销。具体地说，本发明涉及一种在传输和接收方向上利用不同的信令或波特率的通信系统中的回波消除的方法和装置，由此与传统方法相比，回波抵消的计算开销显着降低。在本文的优选实施例中，本发明在利用对称信息速率的对称信息速率的数据通信系统中减少了与回波消除相关联的计算开销的一半。

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