J4 ›› 2015, Vol. 42 ›› Issue (1): 35-41.doi: 10.3969/j.issn.1001-2400.2015.01.006

• 研究论文 • 上一篇    下一篇

一种采用协方差矩阵稀疏表示的DOA估计方法

解虎;冯大政;袁明冬   

  1. (西安电子科技大学 雷达信号处理国家重点实验室,陕西 西安  710071)
  • 收稿日期:2013-11-11 出版日期:2015-02-20 发布日期:2015-04-14
  • 通讯作者: 解虎
  • 作者简介:解虎(1987-),男,西安电子科技大学博士研究生,E-mail: xiehumor@gmail.com.
  • 基金资助:

    国家自然科学基金资助项目(61271293)

DOA estimation method by utilizing sparse representation of the covariance matrix

XIE Hu;FENG Dazheng;YUAN Mingdong   

  1. (National Key Lab. of Radar Signal Processing, Xidian Univ., Xi'an  710071, China)
  • Received:2013-11-11 Online:2015-02-20 Published:2015-04-14
  • Contact: XIE Hu

摘要:

提出一种新的基于样本协方差矩阵稀疏表示的联合波达方向估计方法.该方法对传统的基于协方差矩阵稀疏表示的模型进行改进,仅利用协方差矩阵的部分信息来进行波达方向估计,无须已知噪声功率,以极小的孔径损失换取算法的稳健性.虽然是基于样本统计信息(即协方差矩阵)的波达方向估计方法,但是其原理与传统的角度高分辨估计方法(MUSIC,CAPON)不同,该算法对具有任意相关性的信号源能进行有效的波达方向估计,不需要进行去相关处理,且具有很高的分辨力及估计精度.

关键词: 稀疏表示, 波达方向估计, 高分辨, 协方差矩阵, 多帧测量, 相关信号

Abstract:

A direction of arrival (DOA) estimation method based on a new sparse representation model of the covariance matrix is proposed. Without requiring the prior-knowledge on the noise level, the proposed method only utilizes partial information on the covariance matrix for the DOA estimation and provides robustness to noise at the cost of a tiny aperture loss. Although the proposed method is based on the statistical information on samples (i.e., covariance matrix), its principle is different from that of the traditional high-resolution DOA estimation methods (e.g., MUSIC, CAPON). The proposed method can effectively distinguish the signal sources with any coherence without decorrelation processing.

Key words: sparse representation, direction-of-arrival estimation, high-resolution, covariance matrix, multiple measurement, correlative signal

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