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

doi:10.3969/j.issn.1000-1093.2020.11.012

Abstract

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

CLC Number:

TN971⁺.1

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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