基于LMS的自适应直放站回波消除算法研究  

Research on Echo Cancellation Algorithm of Adaptive Repeater Based on LMS

作　　者：王鹏[1,2] 王明泉[1,2] 李晓阳[1,2] 乔佳亮[1,2] 

机构地区：[1]中北大学仪器科学与动态测试教育部重点实验室,山西太原030051 [2]中北大学信息与通信工程学院,山西太原030051

出　　处：《电视技术》2013年第11期155-158,共4页Video Engineering

基　　金：国家自然科学基金项目(6171177)

摘　　要：针对无线同频直放站转发器输出的大功率射频信号可使整个系统会自激这一问题,提出了基于LMS的回波消除系统算法。如果不用回波消除,会造成增益不可增大以及系统容易自激,若整个系统自激,可造成系统不稳定,进而可能损坏末级放大器。采用回波抑制技术后,可以有效改善信号的回波对系统的影响,提高系统的稳定性。仿真结果表明该算法可有效地抑制回波。Since the high power radio wave output by the wireless with frequency repeater station may lead to self-excitation of the whole system, an echo cancellation algorithm based on LMS is put forward in this paper. If echo cancellation is not used, it will result in transmission gain unable to increase, as well as easy self-oscillation of the system. Once the system is self-oscillation, it may become instable, which in turn may damage the final amplifier. Using the echo suppression technology can effectively improve the echo signal＇s effect on the system, improving the stability of the system. Simulation results indicate that this kind of algorithm can effectively suppress echoes.

关 键 词：LMS算法 系统自激 回波消除 

分 类 号：TN911[电子电信—通信与信息系统]