一种基于恒模1-2准则的有效盲均衡(英文)

Effective blind equalization based on constant modulus 1-2 criterion

在数字通信系统中,将坐标变换应用于恒模算法可以有效提高其均衡非恒模信号时的效果.针对典型的16-QAM非恒模信号,将坐标变换与恒模1-2准则有机融合,从而提出了一种基于恒模1-2准则的有效盲均衡.利用计算机仿真对新方法和传统的基于恒模1-2准则和恒模2-2准则的盲均衡算法进行性能比较,仿真结果表明新方法具有最低的稳态均方误差和最快的收敛速度.

Coordinate transformation has been proved to be a correct solution when constant modulus algorithm（CMA） is used to equalize the non-constant modulus signals in the digital communication systems. For the 16-QAM signals, this paper propo- ses an effective blind equalization based on constant modulus 1-2 criterion, and it makes use of the coordinate transformation too. The computer simulations are presented for the new algorithm, traditional blind equalization algorithms based on constant modulus 1-2 and constant modulus 2-2 criterions respectively. The simulation results show that the new algorithm is the lowest in steady-state mean square error and fastest in convergence rate among them.