基于DMB-T数字电视转发器回波抵消方案研究  

Study on Echo Cancellation Scheme based on DMB-T Standard for Digital TV Gap-Filler

作　　者：张福洪[1] 陈胜康[1] 戴绍港[1] 

机构地区：[1]杭州电子科技大学通信工程学院,浙江杭州310018

出　　处：《中国有线电视》2009年第12期1245-1248,共4页China Digital Cable TV

摘　　要：以数字电视地面广播DMB-T标准为基础,提出了一种基于数字电视转发器中的回波抵消方案。该方案通过相关算法获取PN码的回波路径特性,进而获取该路径中相关的参数,最后利用得到参数来生成逼近回波信号的抵消信号,并从接收信号中减去该抵消信号达到回波消除的目的。仿真结果表明,该方法具有良好的回波消除性能,并具有一定实际应用价值。The article talks about a scheme of actualizing echo cancellation on digital TV gap filler based on the National Standard for DMB - T. This Scheme obtains the echo path properties of PN code by making use of the correlation algorithm and then gets the relevant parameter of the echo path. In the end, it generates the cancellation signals close to the echo signals from the parameters, and then reaching the goal of getting echo cancellation by subtracting the cancellation signals from the received signals. The results of computer simulation show the favorable performance in echo cancellation and practical value in actual application.

关 键 词：DMB-T 回波消除 自适应滤波 PN码 

分 类 号：TN949.197[电子电信—信号与信息处理]