计算机应用 ›› 2012, Vol. 32 ›› Issue (02): 592-594.DOI: 10.3724/SP.J.1087.2012.00592

• 典型应用 • 上一篇    

信号相关性与修正MUSIC算法二维波达方向估计

刘康1,2,习友宝1,李智2   

  1. 1. 电子科技大学 电子工程学院，成都 610054
    2. 电子信息控制重点实验室，成都 610036
  • 收稿日期:2011-07-03 修回日期:2011-09-15 发布日期:2012-02-23 出版日期:2012-02-01
  • 通讯作者: 刘康
  • 作者简介:刘康(1987-)，男，湖北仙桃人，硕士研究生，主要研究方向：阵列信号处理；
    习友宝(1961-)，男，四川成都人，教授，主要研究方向：测控技术，数据采集；
    李智(1981-)，女，四川成都人，高级工程师，博士，主要研究方向：电子对抗。
  • 基金资助:
    国防科技重点实验室基金资助项目(9140C1004060903)

2-D direction of arrival estimation based on signal correlation and modified MUSIC algorithm

LIU Kang1,2,XI You-bao2,LI Zhi3   

  1. 1. Laboratory of Science and Technology on Electronic Information Control, Chengdu Sichuan 610036, China
    2. School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu Sichuan 610054, China
    3. Laboratory of Science and Technology on Electronic Information Control, Chengdu Sichuan 610036, China
  • Received:2011-07-03 Revised:2011-09-15 Online:2012-02-23 Published:2012-02-01
  • Contact: LIU Kang

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摘要： 实际环境中相干信号源是普遍存在的，但传统的多信号分类(MUSIC)二维测向算法不能处理相干信号的问题，为此，采用修正MUSIC(MMUSIC)算法进行二维波达方向(DOA)估计,将修正MMUSIC算法的应用范围由一维的均匀线阵(ULA)扩展到二维中心对称阵，并理论推导出MMUSIC算法的测向性能与信号相差的余弦值呈反比。仿真实验中，二维MMUSIC对相隔4°以上两相干信号的分辨概率能够达到90%以上。

关键词: 相干信源, 修正多信号分类算法, 波达方向估计, 空间谱

Abstract: The coherent signal is widespread in the actual environment. Concerning the problem that traditional 2-D Direction Of Arrival (DOA) algorithm of Multiple Signal Classification (MUSIC) cannot process the coherent signal, the Modified MUSIC (MMUSIC) algorithm was used to realize the 2-D DOA estimation for the coherent imaginaries signal. The applied range of the modified MUSIC algorithm was extended from 1-D Uniform Linear Array (ULA) to 2-D centre-symmetric array, and it had been deduced by theory that bearing performance of MMUSIC algorithm was inversely proportional to the cosine value of phase difference. For two coherent signals of being separated by more than 4 degrees, the successful probability of the 2-D MMSUIC algorithm can be more than 90% in simulation experiments.

Key words: coherent source, Modified Multiple Signal Classification (MMUSIC) algorithm, Direction Of Arrival (DOA) estimation, spatial spectrum

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