上海交通大学学报

上海交通大学学报（自然版） ›› 2011, Vol. 45 ›› Issue (03): 345-0349.

• 无线电电子学、电信技术 • 上一篇    下一篇

一种基于分数阶傅里叶变换域加权MUSIC算法的移动单站多目标无源定位方法

何伟艳, 金荣洪, 耿军平, 梁仙灵   

  1. （上海交通大学 电子信息与电气工程学院， 上海200240）
  • 收稿日期:2010-03-30 出版日期:2011-03-30 发布日期:2011-03-30
  • 基金资助:

    航天支撑基金资助项目，国家重点基础研究发展规划（973）项目 (2009CB320205)

A Method for Multitarget Passive Location by a Movable Single Station  Based on Weighted MUSIC Algorithm in FRFT Domain

 HE  Wei-Yan, JIN  Rong-Hong, GENG  Jun-Ping, LIANG  Xian-Ling   

  1. (School of Electronic, Information and Electrical Engineering, Shanghai Jiaotong University, Shanghai 200240, China)
  • Received:2010-03-30 Online:2011-03-30 Published:2011-03-30

摘要：  针对多个线性调频信号目标源存在的情况，通过分析接收信号的多普勒频移，建立移动单站上天线阵列对多分量线性调频（LFM）信号的接收模型，提出基于分数阶傅里叶变换（FRFT）域加权MUSIC算法的无源定位方法，实现了低信噪比下多目标的信号检测与方位估计.仿真结果表明，该算法可以分辨多个频率及空间相近的目标源，且精度很高.

关键词: 线性调频信号, 多目标, 无源定位, 分数阶傅里叶变换, 加权MUSIC算法

Abstract:
Aiming at the situation of multiple linear frequency modulation(LFM) signal sources, by analyzing the Doppler shift of received signals, a multicomponent LFM signal model for the antenna array on a movable single station was built. Then a method for multitarget passive location based on weighted MUSIC algorithm in fractional Fourier transformation(FRFT) domain was presented, which implements the detection and DOA estimation of multitarget signals at low SNR. The simulation results show that  multiple targets with similar frequency and close space can be distinguished in a high accuracy.
algorithm

Key words:  linear frequency modulation(LFM) signal, multitarget, passive location, fractional Fourier transformation(FRFT), weighted MUSIC algorithm

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