多径信道下一种鲁棒的符号速率盲估计算法  

A robust blind symbol rate estimation algorithm in multi-path fading channels

作　　者：李东武[1] 裴昌幸[1] 何先灯[1] 孟云亮 

机构地区：[1]西安电子科技大学ISN国家重点实验室,陕西西安710071

出　　处：《西北大学学报（自然科学版）》2014年第2期206-210,共5页Journal of Northwest University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(61072067;61372076);国家重点实验室专项基金资助项目(ISN1001004);高等学校学科创新引智计划基金资助项目(B08038)

摘　　要：提出一种鲁棒的符号速率盲估计算法:接收信号首先采用改进的恒模算法进行盲均衡处理,消除信号的符号间干扰,然后再采用延迟相乘法估计其符号速率。接收机利用该算法即可完成对符号速率的盲检测,因而在信号检测领域中具有非常强的实用性。计算机仿真结果表明,新算法可有效消除符号间干扰,大大提高了符号速率检测的正确率,且具有良好的鲁棒性。Due to the effect of multi-path fading channels,inter-symbol interference will be generated in the receipt signal,and this will lead to the inefficiency of delay-multiply which can be used to estimate the symbol rate.Aiming at this problem,this paper presents a robust blind symbol rate estimation algorithm in the multipath fading channels.The received signal is firstly processed by blind equalization using modified constant modulus algorithm to remove the inter-symbol interference,and then the symbol rate can be obtained successfully by delay-multiply approach.The new scheme rarely depends on any channel state information,so it shows an excellent efficiency in the signal detection domain.Computer simulations show that the new algorithm can effectively eliminate inter-symbol interference,has greatly improved the detection success rate of the symbol rate,and it is dramatically robust as well.

关 键 词：频率选择性衰落 盲均衡 延迟相乘 符号速率估计 

分 类 号：TN92[电子电信—通信与信息系统]