一种新的强干扰条件下微弱信号DOA估计算法  

A new method for weak signals' DOA estimation in the presence of strong interferences

作　　者：屈金佑[1] 张剑云[2] 

机构地区：[1]中国人民解放军91635部队 [2]解放军电子工程学院

出　　处：《航天电子对抗》2011年第5期61-64,共4页Aerospace Electronic Warfare

摘　　要：提出了一种基于扩展噪声子空间的强干扰条件下微弱信号DOA估计算法。该算法在已知强干扰源个数条件下,通过构造扩展的噪声子空间,在此基础上利用MUSIC方法有效地抑制干扰,并且准确估计出微弱信号的DOA参数。此算法的优势在于无需已知强干扰信号方向,且运算量与MUSIC方法相当。仿真实验验证了该算法是有效性和可行性。Based on the extended noise subspace,the case of weak signal direction of arrival（DOA） estimation in presence of strong jamming is studied,and a novel approach is given.Under the condition knowing the number of strong interferences,first,the method forms the extended noise subspace,then,uses the conventional multiple signal classification（MUSIC） algorithm to constrain the strong interferences effectively and estimates weak signals＇ DOA information accurately based on the extended noise subspace.The method does not require the angle information of strong interferences and it has the same computation burden as conventional MUSIC.Theoretic analysis and computer simulation demonstrate the method is effective and feasible.

关 键 词：波达方向估计 干扰抑制 子空间 多重信号分类法 

分 类 号：TN911.23[电子电信—通信与信息系统]