利用多普勒信息的波达方向最大似然估计方法  

Maximum Likelihood DOA Estimation by using Doppler Information

作　　者：贾永康[1] 保铮[1] 

机构地区：[1]西安电子科技大学雷达信号处理重点实验室

出　　处：《电子学报》1997年第6期71-76,共6页Acta Electronica Sinica

基　　金：国家自然科学基金;电科院基金

摘　　要：为了充分利用信号的时域特性来改善信号波达方向（ＤＯＡ）的估计性能，本文从最大似然估计出发，推导了在有限快拍、低信噪比情况下多普勒信号波达方向的迭代估计算法，为进一步减小运算量，本文还推导了一种简化算法．本文提出的两种算法对低信噪比，少快拍数下多普勒信号的ＤＯＡ估计性能比不利用时域特性的传统ＭＬ方法有明显改善．Ｍｏｎｔｅ－Ｃａｒｌｏ实验验证了本文方法的有效性．For the purPOse of improving the DOA estimation Performance,we present a newiterative algorithm for estimating the DOA of multiple dappler signals by using both the signal' Stemporal and spatial structures in the case of less snapshots and low SNR. In this Paper, a simplified algorithm is also presented to reduce the computation. These two algorithms outpefferm theconventional ML method which does not use the signal' S temporal structure in the case mentionedabove. Monto-Carlo experiments illustrate the efficiency of proposed algorithms.

关 键 词：最大似然估计 波达方向 二维参数估计 信号估计 

分 类 号：TN911.23[电子电信—通信与信息系统]