Research of a Variable Step Dual-mode Decorrelating Blind Equalization Algorithm
Xiaodong Wang · Radio and communications technology · 2012
CMA is a very important technology of blind equalization.Although it can achieve the aim of blind equalization,it has the problems of large residual error and phase ambiguity when converged.In this paper,two variable step modified dual-mode blind equalization algorithms are proposed.The algorithm of VS-MMMA+DD-LMS combines the modified multi-modulus algorithm and the decision directed algorithm.The algorithm of VS-UMMMA+DD-LMS combines the decorrelating modified multi-modulus algorithm and the decision directed algorithm.The algorithms proposed in this paper can improve the speed of convergence and reduce the residual error effectively compared with the algorithm(VS-MCMA+DD-LMS) in paper [3].The capability of improved algorithms are simulated and analysed in this paper.