基于Dual-Mode MCMA+DD双模式盲均衡算法研究

为了兼顾误差性能和收敛速度,研究了将双模修正常量模算法和判决引导算法有机结合的双模式盲均衡算法.该算法在收敛初期采用双模修正常量模算法调整均衡器,然后根据判决条件自动切换到判决引导算法,最终实现信道的盲均衡.仿真结果表明:此算法收敛速度快、稳态误差小,并能在去除码间干扰的同时纠正信道固有的相位旋转,具有很好的实用性.

Dual Mode Blind Equalization Algorithm Based on Dual-Mode MCMA+DD

A dual mode blind equalization algorithm was proposed based on the dual-mode modified constant modulus algorithm and decision directed algorithm, which has more rapid convergence and smaller error. This algorithm firstly adjusts the coefficients of equalizer by dual-mode MCMA algorithm and then automatically switches to DD algorithm according to certain decision condition. Simulation shows that the new blind equalization algorithm has fast convergence rate and small steady-state error, and at the same time it can correct the channel phase rotation when removing the inter-symbol interference, thus is of practical importance.