| 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。 |
| 关键词: 智能天线 测向 相干信号 虚拟阵列平移 改进MUSIC算法 D
oA估计 |
| DOI： |
|
| 基金项目: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） |
|
| DoA estimation of coherent sources by using virtual array-based improved MUSIC algorithm |
| FU Shu-juan,JING Xiao-rong,ZHANG Zu-fan，,ZHANG Yong-jie |
| () |
| Abstract: |
| Due to the effect of multipath propagation,the coherent sources must be conside
red in direction finding(DF) of smart antenna
systems. In this paper, an improved MUSIC(Multiple Signal Classification) algor
ithm based on virtual array moving is proposed for t
h
e DoA(Direction of Arrival) estimation of coherent sources. Simulation results s
how that, when the dif
ference of DoAs is very small(even about 5°), the proposed algorithm can
effectively find the directions of the coherent signals. Also, it does not decr
ease effective array aperture and can detect the number of (M－1) coherent s
ignals for an array with M sensors. Furthermore, the algorithm is suit to Do
A estimation of all signals, including coherent and incoherent signals. |
| Key words: smart antenna direction finding coherent signal virtual array moving improved MUSIC algorithm DoA estimation |
