基于修正变步长方法的自适应通道一致性校正

Adaptive Channel Correction Based on Modified Variable Step Size Algorithm

针对多通道接收机的幅相不一致问题,提出了基于自适应算法扩展最小均方误差(ELMS)的修正变步长算法。该算法通过对过去误差项的非线性加权,并结合均方误差及误差的相关性对步长进行控制,在算法初始阶段选择大步长,提高收敛速度,在算法收敛后,保持较小步长,保证算法的稳态性。仿真结果表明该算法对通道的不一致性具有良好的校正效果。

Aiming at the problem of inconsistency of multi-channel receiver＇s amplitude and phase, an modified variable step size algorithm based on adaptive algorithm of minimum mean square error （ ELMS ）was proposed. The algorithm was based on the past errors for nonlinear weighted, and combined with the mean square error and error correlation on the step control. In the initial stage of large step size algorithm selection, the rate of convergence was improved. In the algorithm convergence, a small step was kept and the stability of algorithm was ensured. Simulation results showed that the algorithm had a good channel inconsistencies correction.