盲信道均衡的动量恒模算法

介绍了盲信道均衡恒模算法(CMA)的基本原理,对恒模算法的缺点进行了分析,通过修正恒模算法的迭代公式提出一种动量恒模算法(MCMA)。利用QPSK信号,采用计算机仿真的方法对动量恒模算法与恒模算法进行盲均衡性能比较,模拟结果显示,MCMA算法比CMA算法在收敛速率、降低稳态均方误差和符号间干扰具有明显的优势,有效地改进了信道均衡性能。

Momentum constant modulus algorithm for blind channel equalization

In this paper,the principle of the constant modulus algorithm(CMA) is introduced for blind channel qualization.After analyzing the disadvantages of CMA,momentum constant modulus algorithm(MCMA) is presented by modifying updating algorithm of CMA for blind qualization.By simulation,the performance of the proposed algorithm is compared with CMA by QPSK signal.The result shows that the MCMA is better and more robust in noise environments under the multipath propagation channel.Simulation demonstrates the MCMA can effectively improve the channel equlization by increasing convergence rate and decreasing mean square error and intersymbol interference(ISI).