吉林大学学报(工学版) ›› 2014, Vol. 44 ›› Issue (2): 490-496.doi: 10.13229/j.cnki.jdxbgxb201402034

• 论文 • 上一篇    下一篇

基于部分重合信号的空间谱估计新方法

司伟建, 吴迪, 陈涛   

  1. 哈尔滨工程大学 信息与通信工程学院, 哈尔滨 150001
  • 收稿日期:2012-10-25 出版日期:2014-02-01 发布日期:2014-02-01
  • 通讯作者: 吴迪(1987- ),女,博士研究生.研究方向:宽带信号的检测、处理和识别.E-mail:wudi7212@126.com E-mail:wudi7212@126.com
  • 作者简介:司伟建(1971- ),男,研究员.研究方向:宽带信号的检测、处理和识别.E-mail:swj0418@263.net
  • 基金资助:

    国家自然科学基金项目(61201410/F010301);中央高校基本科研业务费重点专项项目(HEUCFZ1215).

New spatial spectrum estimation method based on partly overlapped signals

SI Wei-jian, WU Di, CHEN Tao   

  1. College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China
  • Received:2012-10-25 Online:2014-02-01 Published:2014-02-01

摘要:

为了提高色噪声背景下空间谱估计多重信号分类(MUSIC)算法的分辨率,根据诱饵信号覆盖雷达信号时,实际被动测向系统接收脉冲信号部分重合的特点,提出了一种色噪声背景下空间谱估计的新方法。首先对接收数据进行分段,然后估计每段数据的信源数,最后对各段接收数据的协方差矩阵对角线进行归一化,利用协方差差值MUSIC算法,给出各信号的协方差矩阵,通过多次谱峰搜索,分步得到信号波达方向(DOA)估计结果。计算机仿真及实际系统测试均验证了所提出的方法是可行的。

关键词: 通信技术, DOA估计, 色噪声, 差值MUSIC算法, 部分重合, 分辨率

Abstract:

In order to improve the resolution of spatial spectrum estimation multiple signal classification (MUSIC) algorithm in the presence of colored noise fields, a new spatial spectrum estimation method was proposed. This method is based on the receiving characteristic of pulse signals in an actual direction finding system, when decoy signals overlap radar signals. In this method, first, the receiving data are divided into several segments; then the number of signals of every receiving data segment is estimated; finally, the covariance matrix of every receiving data segment is normalized by covariance matrix diagonal elements. The covariance matrix of every signal is given by using covariance difference MUSIC algorithm. By searching spectrum peak, the result of Direction of Arrival (DOA) estimation can be obtained step by step. Both simulation and test based on actual direction finding system prove the proposed method realizable.

Key words: communication, DOA estimation, colored noise, difference MUSIC algorithm, part overlap, resolution

中图分类号: 

  • TN911

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