现代电子技术2018，Vol.41Issue(3)：10-13,4.DOI:10.16652/j.issn.1004-373x.2018.03.003
一种基于CMA的变步长盲均衡算法研究
Study on variable step blind equalization algorithm based on CMA
李茹 1张涛 2朱秋煜2
作者信息
- 1. 上海大学 通信与信息工程学院,上海 200072
- 2. 中国科学院 上海技术物理研究所,上海 200083
- 折叠
摘要
Abstract
The inter-symbol interference generated by channel distortion in communication process affects the communica-tion quality seriously,and is solved with equalization technology. The principle of traditional fixed step blind equalization con-stant modulus algorithm(CMA)is introduced. The problem that the fast convergence rate and small steady-state error can′t be both balanced is analyzed with simulation. To solve this problem,a variable step blind equalization algorithm based on Sigmoid function is proposed. The CMA is improved to eliminate the inter-symbol interference,and principle of its improved algorithm is elaborated. The effect of the parameters in the algorithm on the algorithm performance is analyzed. The results of simulation ex-periments show that the algorithm can maintain a small steady-state error while accelerating the convergence speed.关键词
均衡技术/恒模算法/码间干扰/Sigmoid函数/收敛速度/稳态误差Key words
equalization technology/constant modulus algorithm/inter-symbol interference/Sigmoid function/conver-gence rate/steady-state error分类
信息技术与安全科学引用本文复制引用
李茹,张涛,朱秋煜..一种基于CMA的变步长盲均衡算法研究[J].现代电子技术,2018,41(3):10-13,4.
