电子学报 ›› 2013, Vol. 41 ›› Issue (7): 1278-1283.DOI: 10.3969/j.issn.0372-2112.2013.07.006

• 学术论文 • 上一篇    下一篇

一种有效的相关噪声背景下宽带相干信号DOA估计算法

张进1, 叶中付2, 毛云祥1   

  1. 1. 电子工程学院, 安徽合肥 230027;
    2. 中国科学技术大学, 安徽合肥 230027
  • 收稿日期:2011-09-22 修回日期:2013-03-15 出版日期:2013-07-25
    • 作者简介:
    • 张进 男,1974年生于安徽芜湖,讲师,2010年获中国科技大学博士学位,主要研究方向为阵列信号处理和高速数字信号处理.E-mail:zhj313@mail.ustc.edu.cn;叶中付 男,1959年生于安徽桐城,教授,博士生导师,1995年获得中国科学技术大学博士学位,主要研究方向为统计信号分析与处理、阵列信号处理、图像分析与处理;毛云祥 男,1973年生于浙江诸暨,讲师,2004年获解放军电子工程学院硕士学位,主要研究方向为雷达信号处理.

An Efficient DOA Estimation Method for Wideband Coherent Signals in the Presence of Correlated Noise

ZHANG Jin1, YE Zhong-fu2, MAO Yun-xiang1   

  1. 1. Electronic Engineering Institute, Hefei, Anhui 230027, China;
    2. Department of Electronic Engineering and Information Science, USTC, Hefei, Anhui 230027, China
  • Received:2011-09-22 Revised:2013-03-15 Online:2013-07-25 Published:2013-07-25

摘要: 利用均匀线阵,本文提出了一种有效的相关噪声下宽带相干信号DOA估计算法.首先,在各个频率点,利用空间差分技术消除色噪声分量,并通过平方操作构造新矩阵;然后,通过聚焦操作得到通用的协方差矩阵;最后,通过使用传播算法估计得到宽带相干信号的DOA.算法能够分辨的相干组中相干信号的个数可以是奇数或是偶数.仿真结果验证了算法的有效性和性能.

关键词: 宽带相干信号, DOA估计, 均匀线阵, 空间相关噪声, 传播算法

Abstract: In this paper,we propose an efficient direction of arrival estimation method for wideband coherent signals in the presence of correlated noise with uniform linear array.Firstly,the component of correlated noise is eliminated by using the spatial differencing technique and then a new matrix is constructed by performing the squaring operation at each frequency bin.Afterwards,a universal covariance matrix is obtained by performing a focusing operation.Finally,the coherent signals are resolved by applying the propagator method.The signal number in a coherent group resolved by the proposed method can be even or odd.Simulation results demonstrate the effectiveness and performance of the proposed method.

Key words: wideband coherent signal, direction-of-arrival estimation, uniform linear array, spatially correlated noise, propagator method

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