远近场混合循环平稳信源定位方法

doi:10.7964/jdxbgxb201405040

吉林大学学报(工学版) ›› 2014, Vol. 44 ›› Issue (5): 1474-1480.doi: 10.7964/jdxbgxb201405040

远近场混合循环平稳信源定位方法

燕学智, 陈磊, 刘国红, 刘妍妍

吉林大学通信工程学院, 长春 130022

收稿日期:2013-08-01 出版日期:2014-09-01 发布日期:2014-09-01
通讯作者: 刘国红(1986),女,博士研究生.研究方向:信号参量估计.E-mail:liugh10@mails.jlu.edu.cn
作者简介:燕学智(1972), 男, 副教授.研究方向:信号参量估计.E-mail:yanxz@jlu.edu.cn
基金资助:
国家自然科学基金项目(61171137); 教育部新世纪优秀人才计划项目(NCET-09-0426).

Passive localization for mixed far-field and near-field cyclostationary sources

YAN Xue-zhi,CHEN Lei,LIU Guo-hong,LIU Yan-yan

College of Communication Engineering, Jilin University, Changchun 130022, China

Received:2013-08-01 Online:2014-09-01 Published:2014-09-01

摘要/Abstract

摘要：

提出一种基于对称均匀线阵与二阶循环统计量相结合的远近场混合源定位新方法。该方法首先将均匀线阵划分为两个对称子阵,获得仅包含方位角信息的旋转矩阵,以此为基础,构造谱峰搜索函数,实现远场源和近场源角度的同时估计,将获得的方位角信息代入二维MUSIC谱函数,实现近场源距离估计。所提算法计算复杂度低,估计精度较高,且无需参数配对及二维搜索。均方根误差的仿真结果验证了该算法的有效性。

关键词: 通信技术, 阵列信号处理, 远场源定位, 近场源定位, 循环平稳信源

Abstract:

Based on the symmetric Uniform Linear Array (ULA) and the second-order cyclic statistic, an efficient algorithm is proposed to deal with the localization of the mixed far-field and near-field cyclostationary sources. First, by exploiting the symmetric property of the divided subarrays, a rotational matrix is constructed, in which only the Direction-of-Arrival (DOA) information is contained. Then, the DOA estimations for both far-field and near-field sources are performed from a spectral search procedure. Finally, by substituting the obtained azimuth back into the two-dimensional MUSIC spectral function, the range estimations for the near-field sources is performed. Compared with previous works, the proposed algorithm saves computation cost, provides high estimation accuracy, and requires neither two-dimensional search nor parameter-pairing procedure. Computer simulations confirm the feasibility of the proposed algorithm.

Key words: communication technology, array signal processing, far-field source localization, near-field source localization, cyclostationary sources

中图分类号:

TN911.7

燕学智, 陈磊, 刘国红, 刘妍妍. 远近场混合循环平稳信源定位方法[J]. 吉林大学学报(工学版), 2014, 44(5): 1474-1480.

YAN Xue-zhi,CHEN Lei,LIU Guo-hong,LIU Yan-yan. Passive localization for mixed far-field and near-field cyclostationary sources[J]. 吉林大学学报(工学版), 2014, 44(5): 1474-1480.

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远近场混合循环平稳信源定位方法

Passive localization for mixed far-field and near-field cyclostationary sources

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