A Stop and Go Blind Equalization Algorithm for QAM Signals

The constant modulus algorithm (CMA) has been widely used in the blind equalization of quadrature amplitude modulation (QAM) signals, but it has slow convergence rate and large steady state mean square error and the phase blind nature. In this paper, a modified constant modulus algorithm which incorporates a stop and go technique is proposed. The proposed algorithm can speed up convergence rate and decrease steady state mean square error and correct phase error and frequency offset simultaneously. The simulation results demonstrate the effectiveness of the proposed algorithm in improving convergence behavior and bit error rate (BER) performance.