回波抵消技术

基于DSP的回波抵消技术

Realization of the echo cancellation on DSP

论文首先研究了用于声音通信系统中的声回波抵消技术。

This thesis represents acoustic echo cancellation in voice communication system .

大部分回波抵消技术都是基于自适应LMS算法的。

Most of which arc based on self - adapting LMS algorithm .

ADSL中的非对称自适应回波抵消技术

The Adaptive Echo Canceler Used in ADSL

传统的方案采取自适应回波抵消技术来解决第一个问题。

The traditional method applies AEC ( adaptive echo cancel ) technology to solving the first problem .

给出了话音回波抵消技术的原理和参数选择准则。

The principles of the voice echo canceller technologies and the criteria of choosing parameters are given in the paper .

几乎所有的电话保密系统都使用回波抵消技术来实现全双工通信。

The echo cancellation technique is now widely used to implement the full-duplex communication in almost all telephone privacy systems .

分析了传统的双绞线在实现数字传输技术中的难点和缺点，提出了采用时间压缩复用和回波抵消技术的新的全双工数字传输技术。

This paper analyses the difficulty and disadvantage of the traditional twisted-pair applied in digital-transmitted technology and puts forward to the new digital-transmitted technology about full duplex adopting the time-compessed-multiplexed and echo-cancellation .

但全双工双向传输带来严重的回波与串扰问题，为消除双向传输之间的干扰，使用混合电路以及回波抵消技术。

But full-duplex bi-directional transmissions pose a serious echo and cross-talk problems . Hybrid circuits and echo cancellation technology are used to eliminate the interference between bi-directional transmissions .

由于回波是实时变化的，而自适应滤波器以其能有效地在未知环境中跟踪实时变化的输入信号的特点，使得自适应技术在回波抵消技术中得到广泛的应用。

As the echo is changing with the time , so the adaptive technology is widely applied into the echo cancellation technology for adaptive filter has the characteristic of tracing the changing input signals .