航空学报 > 2013, Vol. 34 Issue (2): 378-386   doi: 10.7527/S1000-6893.2013.0043

基于单个长基线干涉仪的运动单站直接定位

张敏, 郭福成, 周一宇   

  1. 国防科学技术大学 电子科学与工程学院, 湖南 长沙 410073
  • 收稿日期:2012-03-13 修回日期:2012-07-13 出版日期:2013-02-25 发布日期:2012-07-30
  • 通讯作者: 郭福成 E-mail:gfcly@21cn.com
  • 作者简介:张敏,男,博士研究生。主要研究方向:无源定位、跟踪滤波技术。Tel:0731-84573490,E-mail:zhangmin1984@126.com;郭福成,男,博士,副教授,硕士生导师。主要研究方向:无源定位、跟踪滤波、信号处理技术等。Tel:0731-84573490,E-mail:gfcly@21cn.com;周一宇,男,博士,教授,博士生导师。主要研究方向:无源定位技术、综合电子信息技术等。Tel:0731-84573490,E-mail:zhouyiyu@sohu.com
  • 基金资助:

    国家"863"计划(2011AA7072043);国防科技重点实验室基金(9140C860304)

A Single Moving Observer Direct Position Determination Method Using a Long Baseline Interferometer

ZHANG Min, GUO Fucheng, ZHOU Yiyu   

  1. School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China
  • Received:2012-03-13 Revised:2012-07-13 Online:2013-02-25 Published:2012-07-30
  • Contact: 10.7527/S1000-6893.2013.0043 E-mail:gfcly@21cn.com
  • Supported by:

    National High-tech Research and Development Program of China (2011AA7072043);National Defense Key Laboratory Foundation of China (9140C860304)

摘要:

针对以往单站无源定位系统中采用的多通道干涉仪或阵列测向系统复杂、易受通道间幅相不一致性影响等缺点,提出了一种基于信号子空间分解的运动单站单个长基线干涉仪(LBI)直接定位(DPD)方法。该方法采用量子粒子群优化(QPSO)方法获得定位初值,再利用Newton迭代方法得到精估计值。仿真结果表明:增加观测器的机动性,可对辐射源实现快速无模糊的定位;定位性能在较高信噪比(SNR)下可接近定位误差的克拉美-罗下限(CRLB),在低信噪比下优于多通道干涉仪仅测角(BO)和长基线相位差变化率定位方法。

关键词: 无源定位, 干涉仪, 直接定位, 子空间分解, 粒子群优化, 迭代方法

Abstract:

In view of the complex structures and amplitude-phase inconsistencies among receiving channels in single observer localization systems using multi-channel interferometers or arrays, a direct position determination (DPD) method is advanced in this paper based on subspace decomposition using a long baseline interferometer (LBI). A quantum-behaved particle swarm optimization (QPSO) initialization algorithm is designed and then the Newton method is used to improve the estimation. Simulation results show that observer maneuver should be taken into consideration to achieve fast unambiguous results. The proposed method can approach Cramer-Rao lower bound (CRLB) at high signal noise rate (SNR) and achieve better performance than the bearing-only (BO) method using multi-channel interferometers and the phase difference rate method by LBI under low SNR.

Key words: passive localization, interferometer, direct position determination, subspace decomposition, particle swarm optimization, iterative method

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