DSE-CMA:一种新的常数模盲均衡算法

Dithered Signed-Error CMA: A Novel Constant Modulus Algorithm for Blind Equalization

针对单输入多输出 (SIMO)通信接收系统模型下的常数模算法计算量比较大的缺点 ,以及另一种改进的 CMA算法 ,即 Signed- Error CMA算法收敛性能不稳定的弱点 ,引入了一种新的盲均衡算法 ,即 Dithered Signed- Error CMA(DSE- CMA)算法 ,并分析了 DSE- CMA算法的实现原理和实现过程中的各种约束条件 ,通过仿真实验比较了这 3种算法的性能 .实验表明 ,DSE- CMA算法具有与一般恒模算法相近的性能 ,但计算量明显减小 ,且比 SE-

This paper provided a novel blind equalization algorithm, named dithered signed-error CMA algorithm, aiming at avoiding the default of CMA algorithm whose operand is enormous, as well as the default of signed-error CMA algorithm whose convergence performance is not robust. Also it gave the realization principle of the dithered signed-error CMA algorithm and the respective constrained conditions of this algorithm. At the end, it compared the performance of these three algorithms by simulation. The simulation results show that DSE-CMA algorithm has similar performance to CMA algorithm with reduced computation, moreover, DSE-CMA is more robust than SE-CMA algorithm.