一种基于最小Rayleigh熵的盲波束形成算法  

A Blind Beam Forming Algorithm Based on Minimal Rayleigh Entropy

作　　者：唐玲[1] 宋弘[1] 

机构地区：[1]四川理工学院,自贡643000

出　　处：《舰船电子对抗》2010年第5期54-56,107,共4页Shipboard Electronic Countermeasure

基　　金：四川理工学院人才引进科研项目,编号：07ZR24

摘　　要：提出了一种基于最小Rayleigh熵的盲波束形成算法。该算法根据最小Rayleigh熵的原理对恒模算法的代价函数进行改进,其基本思想就是在寻找最优权矢量时把恒模信号的幅值归并到协方差矩阵里去考虑,以得到最小代价函数的闭式解,从而得到初始权值,最后再用最小二乘恒模算法（LSCMA）算法进行更新迭代。这种算法属于块处理,不存在算法收敛局部极小点和收敛速度慢的问题,所以具有较强的优越性。仿真结果证实了算法的有效性。A blind beam forming algorithm based on minimal Rayleigh entropy is proposed in this paper.This algorithm improves the cost function of constant modulus algorithm based on the principle of minimum Rayleigh entropy,its basic idea is to integrate the amplitude of constant modulus signals into the covariance matrix when looking for the optimal weight vector,in order to obtain the closed-form solution of minimum cost function,then obtain the initial weight value,at last uses the least square constant modulus algorithm（LSCMA）to update and iterate it.This algorithm belongs to block processing,there is no problem of local minimal point in algorithm convergence and slow convergence,so it has strong superiority.The simulation results validate its effectiveness.

关 键 词：盲波束形成 最小二乘恒模算法 收敛性 

分 类 号：TN911[电子电信—通信与信息系统]