一种改进的自适应回波抵消器的设计与实现

Design and Realization of an improved Adaptived Echo Canceller

回波是广泛存在于各种通信信道中的噪声干扰。传统的回波抵消器只能滤除缓变的、线性的回波干扰,对一些非线性且较复杂的信道产生的回波,滤波效果并不理想。本文通过比较融合两种经典的自适应算法,LMS算法和RLS算法各自的优点,提出了一种改进的自适应回波抵消器的结构,该回波抵消器已通过MATLAB仿真实现。从仿真的结果来看,该回波抵消器在对信道的兼容性,以及鲁棒性均优于传统回波抵消器。

Echa is a kind of noise interterence which can be found in all kinds of communication channels,Traditional echo cancellers only can filter slow-changed and liner echo interference,When it comes to the echo which was created by complex and nonlinear channel,the performance of the traditional echo canceller will become wore ,This paper provides a new improved Adaptived Echo Cancoller which contains the advantages of the two kinds of traditional adaptive algorthm：LMS and RLS.The Echo Canceller has been successfully simulated in MATLAB,Through the result of the simulation,we can see that this Echo Canceller is better than Traditional ones in compatibility and robusicity.