A Fast Converge Dual-Mode Modified Constant Norm Blind Equalization Algorithm

Abstract

A dual-mode blind equalization algorithm for quadrature amplitude modulation signals is proposed in this paper. It is well known that the famous constant modulus algorithm presents a large steady-state mean square error. The new family of norm algorithm which takes advantage of CMA is included with the simple decision-directed algorithm. The proposed algorithm firstly starts the equalization by CNA and then introduces DD when the eyediagram is convergent. The switching rule is carried out by the mixed gradient. Simple simulation experiments are also proposed to validate the new algorithm.