DOA矩阵类方法中角度兼并问题的分析与改进  

Analysis and Improvement of Angle Ambiguity Problem in DOA Matrix Method

作　　者：张辉[1] 葛临东[1] 周立文 

机构地区：[1]信息工程大学信息工程学院 [2]兰州军区装备部,兰州730000

出　　处：《数据采集与处理》2007年第1期49-53,共5页Journal of Data Acquisition and Processing

基　　金：国防预研基金(6130320)资助项目

摘　　要：简要介绍波达方向(DOA)矩阵法,首先分析了这类方法存在的角度兼并问题,并对一些改进算法进行了比较和分析。然后给出了一种解决方法,该方法首先判断有无兼并发生,当发生角度兼并时,分别估计无兼并信号和兼并信号的二维方向。兼并信号的估计是把DOA矩阵法和MUSIC算法相结合,利用附加的一维搜索方法得到。与DOA矩阵法相比,无角度兼并发生时计算量没有任何增加,有兼并发生时计算量会有限增加。计算机仿真结果验证了本文方法的有效性。A direction of arrival （DOA） matrix method is presented and the angle-ambiguity problem existed in DOA-matrix-like method is analyzed. The performances of some improved DOA matrix methods are compared. Then a solution to the angle ambiguity is proposed, which combines MUSIC and DOA matrix methods. If the angle ambiguity happens, an accessional one-dimensional spectrum peak search process is carried out to find the correct angles of ambiguous sources. Compared with the DOA matrix method, the computational complexity is increased slightly when angle ambiguity occurs. Simulation results prove the effectivity of the proposed method.

关 键 词：波达方向矩阵法 二维波达方向估计 角度兼并 矩形阵列 

分 类 号：TN911.7[电子电信—通信与信息系统]