一种修正的双模式盲均衡算法研究  

Study of Modified Dual Mode Blind Equalization Algorithm

作　　者：张树勇[1] 李晓波[2] 郭岩[2] 梁国栋[2] 

机构地区：[1]中国人民解放军驻哈尔滨轴承集团公司军事代表室,黑龙江哈尔滨150036 [2]中国人民解放军驻沈阳飞机工业(集团)有限公司军事代表室,辽宁沈阳110034

出　　处：《飞机设计》2013年第5期55-58,共4页Aircraft Design

摘　　要：传统的CMA盲均衡算法存在收敛速度较慢、稳态均方误差较大的缺点。结合了判决引导算法的CMA算法虽具有稳态均方误差小的优势,但是算法本身收敛能力弱,在信号眼图未张开的条件下难以保证算法收敛。针对上述不足,提出了一种含软判决思想的双模式盲均衡算法。该算法通过最大化均衡器输出信号的后验概率密度函数来获得均衡器抽头系数的最优值。计算机仿真结果表明,所提算法可以有效地纠正输出信号的相位旋转,具有较好的均衡效果。The CMA blind equalization algorithm has slow convergence and large steady-state MSE. The convergence of CMA-DD dual mode algorithm is poor when eye diagram is unopened. A modified dual mode blind equalization algorithm based on soft decision-directed is proposed. The optimal tap coefficients of equalizer are obtained through maximizing the posterior probability density function. The simulate results illustrate that the performance of the proposed algorithm which can correct the phase rotation of the carrier frequency is good.

关 键 词：盲均衡 稳态均方误差 软判决 

分 类 号：TN911.2[电子电信—通信与信息系统]