基于联合误差控制的变步长双模盲均衡算法研究  

Varying step modified dual-mode blind equalization algorithm based on joint error function

作　　者：李世平[1] 王爱红[1] 王隆[1] 单凤丽[1] 

机构地区：[1]东北大学信息科学与工程学院,辽宁沈阳110819

出　　处：《微型机与应用》2012年第11期51-54,共4页Microcomputer & Its Applications

摘　　要：针对CMA+DDLMS双模式盲均衡算法对相位不敏感、收敛速度慢、突然切换容易造成误码率升高以及算法不稳定等问题,提出一种基于联合误差控制的变步长双模切换盲均衡算法。与现有双模式算法相比,新算法引入变步长因子有效提高算法收敛速度,同时采用联合绝对剩余误差和判决区域控制的双模切换保证算法的稳健性。采用16QAM系统的仿真结果表明,新算法具有抗干扰能力强、收敛精度高和收敛速度快等特点。In order to solve the problems of the steady-state error, low convergence rate and convergence precision of the CMA＋DDLMS dual-mode blind equalization, a variable step and modified dual-mode blind equalization algorithm is proposed. The proposed algorithm can overcome the phase rotation on the base of quick convergence and make dual-mode switch more stable by adopting the absolute error and decision region control. The simulation result of 16QAM system proves that the improved algorithm has strong suppression ability of ISI, higher convergence precision and fast convergence rate.

关 键 词：盲均衡 变步长 VSMCMA—DDLMS算法 最小均方算法 双模切换 判决域 

分 类 号：TN911.5[电子电信—通信与信息系统]