一种基于stop-and-go改进的MCMA盲均衡算法  

Modified constant modulus blind equalization algorithm based on stop-and-go

作　　者：张艳萍[1] 董方[1] 

机构地区：[1]南京信息工程大学电子与信息工程学院,南京210044

出　　处：《南京信息工程大学学报（自然科学版）》2013年第2期159-162,共4页Journal of Nanjing University of Information Science & Technology（Natural Science Edition）

基　　金：江苏省自然科学基金(BK2009410)

摘　　要：修正的常数模算法(MCMA)可以纠正相位旋转,但剩余稳态误差较大.在stop-and-go架构的基础上,提出了基于stop-and-go改进的MCMA算法.首先将局部信息量引入MCMA的误差函数,然后运用stop-and-go减少错误均衡的思想,使算法的均衡方向与MCMA保持一致,以降低剩余稳态误差.仿真结果表明,基于stop-and-go改进的MCMA盲均衡算法在保证了收敛速度的同时,码间干扰比MCMA算法降低了10dB.Although the modified constant modulus algorithm （MCMA） can correct the phase rotation,it is bothered by relatively high steady-state mean square error（MSE）. In this paper, an improved MCMA blind equalization algo- rithm which incorporates a stop-and-go technique is proposed. First, a new error control function is obtained by in- troduction of the local information. Then, the idea of reducing wrong equalizations in stop-and-go algorithm is used to further lower MSE through synchronizing the direction of the new algorithm with MCMA. The simulation results dem- onstrate that the proposed algorithm not only have the same convergence rate, also lower the inter-symbol interfer- ence by 10 dB compared with MCMA.

关 键 词：水声信道 盲均衡 stop-and-go 修正的常数模算法 

分 类 号：TN91[电子电信—通信与信息系统]