Dual-mode blind equalization algorithm for multi-level QAM modulation based on Sign-CMA
Zhang Zhen-ren · Journal of China Institute of Communications · 2004
A new blind equalization algorithm based on Sign-CMA is proposed for multi-level QAM communication systems. The algorithm changed Sign-CMA from single modulus to multi modulus and operated in two modes. Simulation results are presented to demonstrate the significant improvements in the convergence rates and the residual error after convergence compared with CMA and Sign-CMA. Especially, the algorithm can realize carrier recovery synchronous because its sensitive to channel phase error and frequency shift.