基于MUSIC算法对相干信号DOA估计的研究  

Research into The DOA Estimation of Coherent Signals Based on MUISC Algorithm

作　　者：肖雷[1] 管振辉[1] 杨春华[1] 

机构地区：[1]船舶重工集团公司723所,扬州225001

出　　处：《舰船电子对抗》2010年第6期114-117,共4页Shipboard Electronic Countermeasure

摘　　要：空间谱估计是阵列信号处理中的一个重要研究课题。针对经典MUSIC算法在入射源相关的情况下测向失败的问题,通过前后向空间平滑MUSIC算法,利用子阵平滑恢复数据协方差矩阵的原理进行解相干,进而对入射源的波达方向(DOA)进行估计。仿真结果证明:前后向空间平滑算法不仅能估计出空间相互独立信号源的波达方向,还能有效分辨出相干信源的到达角度,且具有较高的分辨能力和估计精度。The space spectrum estimation is an important research subject in the array signal processing.Aiming at the problem that the direction-finding by the traditional MUSIC algorithm may fail when the incident sources are correlative,this paper utilizes the theory of refreshing the data covariance matrix subarray smoothing to perform decorrelation by means of the forward/back spatial smoothing MUSIC algorithm,thereby estimate the direction of arrival（DOA） of incident sources.The simulation results prove that the forward/back spatial smoothing algorithm can not only estimate the DOA of the independent signals in the space,but also effectively distinguish the angle of arrival of coherent signal sources,and has better angular resolution capability and estimation precision.

关 键 词：相干信号 信号处理 空间谱估计 前后向空间平滑算法 

分 类 号：TN971.1[电子电信—信号与信息处理]