RD-MUSIC的二维DOA估计方法

doi:10.3969/j.issn.1001-2400.2013.03.012

J4 ›› 2013, Vol. 40 ›› Issue (3): 81-86+144.doi: 10.3969/j.issn.1001-2400.2013.03.012

RD-MUSIC的二维DOA估计方法

蔡晶晶;李鹏;赵国庆

(西安电子科技大学电子信息攻防对抗与仿真技术教育部重点实验室，陕西西安 710071)

收稿日期:2012-11-03 出版日期:2013-06-20 发布日期:2013-07-29
通讯作者: 蔡晶晶
作者简介:蔡晶晶(1981-)，女，讲师，西安电子科技大学博士研究生，E-mail: jjcai@mail.xidian.edu.cn．
基金资助:
国家自然科学基金资助项目(61072107);中央高校基本科研业务费专项资金资助项目(K5051202003)

Two-dimensional DOA estimation with reduced-dimension MUSIC

CAI Jingjing;LI Peng;ZHAO Guoqing

(Ministry of Education Key Lab. of Electronic Information Countermeasure and Simulation Technology, Xidian Univ., Xi'an 710071， China)

Received:2012-11-03 Online:2013-06-20 Published:2013-07-29
Contact: CAI Jingjing

摘要/Abstract

摘要：

针对二维MUSIC(2D-MUSIC)估计方法实现二维波达方向估计运算量较大的问题，提出了一种基于降维MUSIC(RD-MUSIC)的无需联合搜索与配对的估计方法．该算法利用二次优化方法将二维DOA估计分解为两级一维DOA估计，先用求根法估计信号与x轴夹角，再用最小二乘算法估计信号与y轴夹角，最后利用角度关系式得到信号的二维方向角．仿真实验表明，在信噪比较低的条件下，文中算法比2D-MUSIC算法的精度略高；在信噪比较高的条件下，两者基本相当，但文中算法具有更高的运算速度．

关键词: 二维波达方向估计, 二维MUSIC, 降维MUSIC, 优化算法

Abstract:

According to the heavy computation of two-dimensional DOA estimation with 2D-MUSIC, this paper proposes an RD-MUSIC(Reduced-Dimension MUSIC) DOA estimation method without conjunction search or angle pairing. This algorithm decomposes two dimensional DOA estimation into two stage one dimensional DOA estimation. Firstly, we use the rooting method to estimate the angle between signal direction and x axis. Secondly, least square method is used to estimate the angle between signal direction and y axis. Finally, the 2D angle can be obtained with the angle formula. Simulation results show that the angle accuracy of RD-MUSIC is higher than that of 2D-MUSIC in the low SNR condition, and that they are equal in the high SNR condition, but RD-MUSIC has a higher operation speed.

Key words: 2-D direction of arrival, two-dimension MUSIC, reduced-dimension MUSIC, optimization algorithm

蔡晶晶;李鹏;赵国庆. RD-MUSIC的二维DOA估计方法[J]. J4, 2013, 40(3): 81-86+144.

CAI Jingjing;LI Peng;ZHAO Guoqing. Two-dimensional DOA estimation with reduced-dimension MUSIC[J]. J4, 2013, 40(3): 81-86+144.

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RD-MUSIC的二维DOA估计方法

Two-dimensional DOA estimation with reduced-dimension MUSIC

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