基于虚拟阵列改进MUSIC算法的相干信源DoA估计  

DoA Estimation of Coherent Sources by Using Virtual Array-based Improved MUSIC Algorithm

作　　者：付淑娟[1,2] 景小荣[1,2] 张祖凡[1] 张永杰[2] 

机构地区：[1]重庆邮电大学移动通信技术重点实验室,重庆400065 [2]中国电子科技集团公司第五十四研究所通信网信息传输与分发技术重点实验室,石家庄050081

出　　处：《电讯技术》2011年第11期63-67,共5页Telecommunication Engineering

基　　金：中国电子科技集团公司第五十四研究所通信网信息传输与分发技术重点实验室开放课题(ITD-U10005);重庆市教委科研项目(KJ110526);重庆市科技攻关项目(CSTS;2010AC2143;2010bb2417)~~

摘　　要：受多径传输环境的影响,在智能天线测向研究中,必须考虑相干信源的存在。针对相干信源的波达方向(Direction of Arrival,DoA)估计问题,提出了一种基于虚拟阵列平移的改进MUSIC算法。仿真结果表明:在相干信源入射角度差异很小(约5°)的情况下,该算法依然能准确地估计;同时,该算法不损失阵列孔径,最多可估计出M-1(M为阵元数)个相干信源;此外,该算法具有同时适用于相干信源和非相干信源目标方位估计的优点。Due to the effect of multipath propagation, the coherent sources must be considered in direction finding （DF） of smart antenna systems. In this paper, an improved MUSIC（Multiple Signal Classification） algorithm based on virtual army moving is proposed for the DoA（Direction of Arrival） estimation of coherent sources. Simulation results show that, when the difference of DoAs is very small（even about 5°）, the proposed algorithm can effectively find the directions of the coherent signals. Also, it does not decrease effective array aperture and can detect the number of （M - 1 ） coherent signals for an array with M sensors. Furthermore, the algorithm is suit to DoA estimation of all signals, including coherent and incoherent signals.

关 键 词：智能天线 测向 相干信号 虚拟阵列平移 改进MUSIC算法 DOA估计 

分 类 号：TN911[电子电信—通信与信息系统]