航空学报 > 2010, Vol. 31 Issue (7): 1445-1453

运动单阵元被动合成阵列波达方向估计

王健鹏, 柳征, 姜文利   

  1. 国防科学技术大学 电子科学与工程学院
  • 收稿日期:2009-07-10 修回日期:2010-01-12 出版日期:2010-07-25 发布日期:2010-07-25
  • 通讯作者: 姜文利

DOA Estimation for Passive Synthetic Arrays of Moving Single Sensor

Wang Jianpeng, Liu Zheng, Jiang Wenli   

  1. College of Electronic Science and Engineering, National University ofDefense Technology
  • Received:2009-07-10 Revised:2010-01-12 Online:2010-07-25 Published:2010-07-25
  • Contact: Jiang Wenli

摘要: 提出了一种运动单阵元被动合成阵列波达方向(DOA)估计算法。该算法基于被动合成阵列(PSA)的概念,结合空间谱估计的思想构建了运动单阵元被动合成阵列模型,通过多次不同速度合成阵列过程实现对信号DOA的无模糊估计。通过对单次匀速合成阵列过程进行分析得到,在假设信号频率已知条件下,合成阵列算法能够达到与同孔径实阵列多重信号分类(MUSIC)算法相当的DOA估计性能。仿真验证了被动合成阵列与同孔径实阵列的渐近等效性及算法的有效性。

关键词: 波达方向, 合成孔径, 阵列信号处理, 运动, 被动合成阵列, MUSIC算法

Abstract: A direction of arrival (DOA) estimation algorithm for the passive synthetic arrays (PSA) of a moving single sensor is proposed. Based on the concept of PSA in combination with the idea of spatial spectrum estimation, this algorithm constructs a PSA model, and then in accordance with this data model uses an improved multiple signal classification (MUSIC) algorithm to estimate the DOA of signals impinging on the single sensor. Theoretical analysis shows that, on the assumption that the signal frequencies are known, the algorithm can achieve the same performance in synthesizing one uniform linear array at uniform velocity as the actual physical aperture array using MUSIC algorithm does. Simulation results verify that the passive synthetic array is equivalent to the real aperture array and verify the effect of this algorithm.

Key words: direction of arrival, synthetic apertures, array processing, moving, passive synthetic array, MUSIC algorithm

中图分类号: