基于瑞利分布误差函数的模式切换盲均衡算法  

Mode switching algorithm of blind equalization based on error function of Rayleigh distribution

作　　者：张鹏程[1] 徐志京[1] 

机构地区：[1]上海海事大学信息工程学院,上海201306

出　　处：《计算机工程与设计》2016年第3期746-750,共5页Computer Engineering and Design

基　　金：上海海事大学基金项目(20120108)

摘　　要：针对现有常数模算法和双模式混合盲均衡算法的不足,提出基于瑞利分布误差函数的RDCMA算法并采用基于系统信噪比圆域判决的模式切换结构系统。RDCMA算法主要从误差函数的角度对偏离相同判决距离的输出信号点给予相同补偿,使系统保持较快的收敛速度;通过判决圆域,模式切换型双模式算法将达到稳定收敛的系统切换到判决引导算法,进一步降低系统稳态误差。Matlab仿真结果表明,该算法具有较快的收敛速度及较低的均方误差特性。Aiming at shortcomings of the existing constant modulus algorithm and the dual-mode hybrid blind equalization algorithm,the RDCMA algorithm based on the error function of Rayleigh distribution was proposed and dual-mode switching structure decision system based on circular domain of signal to noise ratio was adopted.For RDCMA algorithm,same error compensation was given to the signals deviated from the same distance and the system remained at the high convergence speed.The dualmode algorithm based on mode switching led the system with stable convergence to a further reducing steady-state error system by decision directed algorithm through circle domain decision.Simulation results of Matlab show that the algorithm has higher convergence speed and lower mean square error.

关 键 词：盲均衡技术 瑞利误差函数 双模式算法 模式切换 圆域判决 

分 类 号：TP393.04[自动化与计算机技术—计算机应用技术]