首页期刊简介编委会投稿启事审稿流程读者订阅广告服务联系我们English
引用本文
  •    [点击复制]
  •    [点击复制]
【打印本页】 【下载PDF全文】 查看/发表评论下载PDF阅读器关闭

←前一篇|后一篇→

过刊浏览    高级检索

本文已被:浏览 54次   下载 0 本文二维码信息
码上扫一扫!
基于虚拟阵列的非圆信号DOA估计
邢瑞阳,吴晔,车吉斌
0
(1.北京跟踪与通信技术研究所,北京100094;2.解放军31003部队,北京100191)
摘要:
针对传统的子空间类波达方向(Direction of Arrival,DOA)估计算法只适用于入射信号个数少于天线数的局限性,利用现代通信系统中常用的非圆信号实值特性,提出了一种虚拟阵列多重信号分类法(Virtual Array Based Multiple Signal Classification,VA-MUSIC)。该方法通过对阵列输出信号进行共轭重构和合并,获得虚拟阵列来增加阵列的有效孔径。更进一步,结合空间平滑技术有效地解决了相干信号的DOA估计问题。与传统的MUSIC算法相比,新算法不仅可以增加最大可估计信源数,而且在DOA估计精度、信号源角分辨能力等方面均有明显的优势。计算机仿真验证了该算法的有效性和优越性。
关键词:  非圆信号  DOA估计  虚拟阵列  MUSIC算法
DOI:
基金项目:
Virtual array based DOA estimation of non-circular signals
XING Ruiyang,WU Ye,CHE Jibin
(1.Beijing Institute of Tracking and Telecommunicating Technology,Beijing 100094,China;2.Unit 31003 of PLA,Beijing 100191,China)
Abstract:
The classical direction of arrival (DOA) estimation method has the main shortcoming that the number of estimated signals must be less than that of antenna array.For this fact,exploiting the non-circular characteristic of widely used communication signals,this paper present a virtual array based multiple signal classification (VA-MUSIC) algorithm.The new method combines the complex conjugate output signals with the original ones of the antenna array,so that the effective array aperture can be improved.Furthermore,by using the spatial smoothing technology,the DOAs of coherent signals can also be estimated.Computer simulations demonstrate that compared with the classical MUSIC,the proposed algorithm can provide much more accurate estimation,especially in the cases of lower signal-to-noise ratio (SNR) and smaller sampling number.
Key words:  non-circular signals  DOA estimation  virtual array  MUSIC algorithm
安全联盟站长平台