基于MUSIC及其改进算法的空间信号到达方向估计方法研究  

Study on DOA Estimation Based on MUSIC Algorithm and Improved Algorithm

作　　者：同非[1] 郭磊[1] 连豪[1] Tong Fei;Guo Lei;Lian Hao(Xi’an Electronic Engineering Research Institute,Xi'an 710100)

机构地区：[1]西安电子工程研究所,西安710100

出　　处：《火控雷达技术》2018年第2期58-62,共5页Fire Control Radar Technology

摘　　要：本文首先介绍了多重信号分类(MUSIC)算法的原理和步骤,给出了不同快拍数和不同信噪比条件下基于MUSIC算法的空间信号到达方向(DOA)估计的仿真和分析,提出了DOA估计系统在工程设计中需要注意的问题和解决办法。随后,针对实际工程中复杂电磁环境下的信号源相干问题,研究了一种基于空间平滑的改进MUSIC算法的原理和步骤,并对传统MUSIC算法与改进MUSIC算法对相干信源的DOA估计性能进行了仿真对比和分析。仿真结果表明,与传统MUSIC算法相比,基于空间平滑改进的MUSIC算法能有效改善对相干信号源的测量性能,得到正确的DOA估计结果。Principle and procedures of multi-signal classification(MUSIC)algorithm are introduced;simulation and analysis of DOA estimation based on the algorithm under the condition of different snapshots and SNR is presented.Problems and solution of DOA estimation system in engineering design are proposed.In order to solve problem of signal source coherent in the complex electromagnetic environment in engineering,an improved MUSIC method based on spatial smoothing is introduced.Comparing with classical MUSIC algorithm,this method can effectively improve measurement performance of coherent signal source,and finally obtain accurate DOA estimation results.

关 键 词：DOA估计 多重信号分类 空间平滑 

分 类 号：TN957.52[电子电信—信号与信息处理]