J4 ›› 2010, Vol. 37 ›› Issue (3): 576-580.doi: 10.3969/j.issn.1001-2400.2010.03.034

• 研究论文 • 上一篇    

基于正交投影的宽带相干信源空间谱测向算法

谢锘1;张润生2;葛建华1;张建立2
  

  1. (1. 西安电子科技大学 综合业务网理论及关键技术国家重点实验室,陕西 西安  710071;
    2. 中国电子科技集团第五十四研究所,河北 石家庄  050081)
  • 收稿日期:2010-01-05 出版日期:2010-06-20 发布日期:2010-07-23
  • 通讯作者: 谢锘
  • 作者简介:谢锘(1966-),男,西安电子科技大学博士研究生,E-mail: cti-jyxy@sohu.com.
  • 基金资助:

    863计划资助项目

Orthogonal projection-based spatial spectrum algorithm for finding the direction of the wideband coherent source

XIE Nuo1;ZHANG Run-sheng2;GE Jian-hua1;ZHANG Jian-li2   

  1. (1. State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an  710071, China;
    2. No.54 Research Inst. of CETC, Shijiazhuang  050081, China)
  • Received:2010-01-05 Online:2010-06-20 Published:2010-07-23
  • Contact: XIE Nuo

摘要:

提出了一种新的相干信号子空间宽带信源空间谱测向算法,该方法通过角度扫描和数据协方差矩阵的正交投影处理,避免了到达角度的预估计和信源个数估计,从而提高空间谱测向的性能,论述了该算法的原理及其实现过程,并和现有算法进行了对比分析.仿真结果表明,在信噪比较低的情况下本算法有更好的角度分辨率和更低的均方根误差.

关键词: 宽带信源, 空间谱估计, 聚焦 DOA, 正交投影

Abstract:

A novel algorithm using the orthogonal projection is proposed, which avoids initially estimating the DOA and the number of sources through angle scanning and covariance matrix orthogonal projection, thereby improving the performance of direction finding by the spatial spectrum. This paper discusses the principle and realization of this method, and we compare other algorithms with the one developed here whose performance is shown to be better under the condition of a low SNR. Computer simulation illustrates that the proposed method has a better angle resolution ability and a lower RMSE.

Key words: wideband sources, spatial spectrum estimation, focusing, DOA, orthogonal projection