超短波多径信号相关干涉仪测向算法

doi:10.3969/j.issn.1000-1093.2020.11.012

兵工学报 ›› 2020, Vol. 41 ›› Issue (11): 2252-2259.doi: 10.3969/j.issn.1000-1093.2020.11.012

超短波多径信号相关干涉仪测向算法

高婕¹，牛刚^1,2，杜太行¹，雷正伟²

（1.河北工业大学人工智能与数据科学学院，天津 300401； 2.32181部队，河北石家庄 050000）

上线日期:2020-12-04
通讯作者: 牛刚（1981—），男，高级工程师 E-mail:18032058600@163.com
作者简介:高婕（1986—），女，博士研究生。 E-mail: gaojie2011@hebut.edu.cn
基金资助:
国家自然科学基金项目(61601496)

Direction Finding Algorithm of Multipath Propagated UHF/VHF Emitters with Correlative Interferometry

GAO Jie¹, NIU Gang^1,2, DU Taihang¹, LEI Zhengwei²

（1.School of Artificial Intelligence, Hebei University of Technology, Tianjin 300401, China; 2.Unit 32181 of PLA, Shijiazhuang 050000, Hebei, China）

Online:2020-12-04

摘要/Abstract

摘要： 测向系统是开展无线电管理工作必不可少的工具之一，其中超短波无线电测向系统经常受到多径传播的影响而导致其实际性能严重下降。基于广泛使用的相关干涉仪软件和硬件系统，提出了一种存在多径传播情况下的测向算法。该算法将参考阵元与选通阵元的电压信号的互相关值分解为稀疏表示形式，并将多包测量数据获得的互相关值以联合稀疏表示的形式进行求解。计算机仿真和暗室实验验证了该算法的性能。与传统相关干涉仪算法相比，所提算法可以在直达径与非直达径的功率相近时仍可正确测向，且可以同时给出直达径和非直达径的方向，提高了相关干涉仪技术对于多径传播的适应性。

关键词: 相关干涉仪, 无线电测向, 多径传播, 超短波

Abstract: A direction finding (DF) system is one of the essential tools for radio management tasks. When DF system operates in UHF/VHF band, it suffers from severe performance loss due to multipath propagations. Based on the widely-adopted correlative interferometry (CI), a DF algorithm is proposed for CI systems in the presence of multipath propagations, which utilizes the cross-correlations of voltage signals between the reference and selected antenna elements, and obtains the DF results from multiple measurement IQ packages in the form of jointly sparse representation. Computer simulations and anechoic chamber experiments have demonstrated the performance of the proposed algorithm. Compared with the traditional CI algorithm, the proposed algorithm can be applied to scenarios where LOS and NLOS path signals have similar powers, and is able to indicate the directions of both paths, which could help increasing the adaptability of CI technique.

Key words: correlativeinterferometry, radiodirectionfinding, multipathpropagation, UHF/VHFwave

中图分类号:

TN971⁺.1

高婕，牛刚，杜太行，雷正伟. 超短波多径信号相关干涉仪测向算法[J]. 兵工学报, 2020, 41(11): 2252-2259.

GAO Jie, NIU Gang, DU Taihang, LEI Zhengwei. Direction Finding Algorithm of Multipath Propagated UHF/VHF Emitters with Correlative Interferometry[J]. Acta Armamentarii, 2020, 41(11): 2252-2259.

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超短波多径信号相关干涉仪测向算法

Direction Finding Algorithm of Multipath Propagated UHF/VHF Emitters with Correlative Interferometry

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