Fractionally-spaced Based Dual-mode Blind Equalization Suitable for High-Order QAM Signals
Leping Wang · Jiangxi kexue · 2011
In order to overcome the slow convergence rate and the large steady-state mean square error(MSE) of the constant modulus algorithm(CMA),a new T/2 Fractional-spaced blind equalization suitable for high-order QAM signals is proposed.This algorithm uses the CMA as the basal mode.And in the second mode it uses the multi-modulus algorithm which means that the equalization for the signals locating in the different modulus is implemented respectively.Furthermore,the two modes operate concurrently,and based on the decision of the equalizer output,the switching for different modulus is automatic.The efficiency of the method is proved by computer simulations.