北京航空航天大学学报 ›› 2014, Vol. 40 ›› Issue (11): 1609-1614.doi: 10.13700/j.bh.1001-5965.2013.0770

• 论文 • 上一篇    下一篇

基于非圆信号的单次快拍二维DOA新算法

李磊1, 李国林1, 马云鹏2   

  1. 1. 海军航空工程学院 研究生管理大队, 烟台 264001;
    2. 北京航空航天大学 航空科学与工程学院, 北京 100191
  • 收稿日期:2014-01-14 出版日期:2014-11-20 发布日期:2014-12-02
  • 作者简介:李磊(1987-),男,山东济宁人,博士生,lilei19880229@gmail.com.
  • 基金资助:

    国家自然科学基金资助项目(61102165)

New method for single-snapshot two-dimensional direction of arrival estimation based on noncircular signals

Li Lei1, Li Guolin1, Ma Yunpeng2   

  1. 1. Graduate Students' Brigade, Engineer of NAEI, Yantai 264001, China;
    2. School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
  • Received:2014-01-14 Online:2014-11-20 Published:2014-12-02

摘要:

针对双平行线阵相干信号二维波达方向(DOA,Direction of Arrival)快速估计问题,利用信号的非圆特性,提出了一种基于非圆信号的单次快拍数据的二维DOA算法.建立新的阵列坐标系,对阵列接收单次快拍数据进行共轭运算,通过数据重新链接得到伪快拍数据,阵列孔径扩展1倍.仅需要对3个伪单快拍矩阵的扩展矩阵进行一次奇异值分解即可实现二维DOA估计和解相干.该算法计算复杂度低,估计精度高,适用于对二维DOA估计实时性要求高的应用背景.计算机仿真结果验证了方法的有效性.

关键词: 非圆信号, 单次快拍, 奇异值分解, 波达方向估计, 相干信号

Abstract:

To resolve the problem of fast estimating two-dimensional direction of arrival (DOA) in coherent signals environment with two parallel linear arrays, a new method for single-snapshot two-dimensional DOA estimation was presented based on noncircular signals. New coordinate system was established and array received data was changed to its conjugate data. Pseudo snapshot data was made and array aperture was doubled by reconnecting data. The coherence between the signals was solved and two-dimensional DOA can be estimated only by using singular values decomposition (SVD) for extended matrix which was made of three pseudo snapshot matrix. The method has low complex degree and high estimation accuracy, so it is suitable for DOA estimation of high real-time attribution background. Simulation indicates that the method is effective.

Key words: noncircular signals, single-snapshot, singular values decomposition (SVD), direction of arrival (DOA) estimation, coherent signals

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