改进MUSIC算法对相关信号源DOA的估计  

Estimation for Signals' DOA by Modified MUSIC Algorithm

作　　者：石娴文[1] 陆锦辉[2] 

机构地区：[1]上海理工大学电气工程学院,上海200093 [2]南京理工大学电光学院,南京2100942

出　　处：《舰船电子工程》2007年第5期80-82,95,共4页Ship Electronic Engineering

摘　　要：MUSIC算法能有效地估计独立信号源的DOA,并且在模型准确的前提下,对DOA的估计可以达到任意精度;MMUSIC算法可改善MUSIC算法对相关信号源的DOA估计性能,且不影响对非相关信号源DOA的估计;但对相干信号源和相隔比较近的小信噪比信号源,MMUSIC算法就不适用了,这里提出一种新的改进MUSIC算法,该算法既能有效估计独立信号源的DOA,也能有效地估计相关信号源和相隔比较近的小信噪比信号源的DOA。计算机仿真结果验证了上述理论分析的合理性。MUSIC algorithm can estimate independent signals' DOA effectively and reach the infinite precision under the premise that the model is proper, but it is ineffective to coherent signals and adjacent signals with small SNR. In this paper, the method of improving DOA estimation performance for correlated signals by using MMUSIC algorithm is concerned. Based on the theoretical analysis of MMUSIC algorithm, a new modified MUSIC algorithm is presented, which can estimate the DOA of coherent signals and adjacent signals with small SNR. The computer simulations have proved the effectiveness of this new modified MUSIC algorithm.

关 键 词：DOA估计 MUSIC算法 相关信号源 仿真 

分 类 号：TN914[电子电信—通信与信息系统]