Parameterized Time-frequency Analysis in Continuous-wave Active Detection

XUE Cheng;GU Yiming;GONG Zaixiao;LI Zhenglin

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  • Sponsored by: China Association for Science and Technology (CAST)

    Editor-In-Chief: Xu Yida

    ISSN 1000-1093

    　

  • Hosted By: China Ordnance Society

    Published By: Acta Armamentarii

    CN 11-2176/TJ

Acta Armamentarii, a Chinese monthly journal, was first published in 1979. The journal is supervised by China Association for Science and Technology, sponsored by China Ordnance Society，and edited and published by Editorial Board of Acta Armamentarii. The Journal is included in all important domestic databases，and also collected by Engineering Index (EI, USA), Chemical Abstracts (CA, USA), Science Abstracts (SA, UK）, Abstract Journal (AJ, Russia), and Current Bibliography on Science and Technology(CBST).Acta Armamentarii has been selected into the journal Of Ordnance Science and Technology (Weapons Industry) Field Of High Quality Scientific and Technological Periodical Classification Catalogue (2022 edition), ranking T1, and the journal of Automotive Engineering Field of High Quality Scientific and technological Periodical classification Catalogue, ranking T2.
Acta Armamentarii ›› 2022, Vol. 43 ›› Issue (7) : 1655-1666. DOI: 10.12382/bgxb.2021.0420
Paper

Parameterized Time-frequency Analysis in Continuous-wave Active Detection

  • XUE Cheng1,2, GU Yiming1, GONG Zaixiao1, LI Zhenglin1,3
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Abstract

Acontinuous wave signal processing algorithm is proposed based on parameterized time-frequency analysis to address the problems of target echo detection and direct wave interference suppression of hyperbolic frequency modulation signal in continuous-wave active detection. First, based on the analysis of the time-frequency characteristics of the hyperbolic frequency modulated continuous wave signal andthe idea of parameterized time-frequency analysis, we propose afrequency-domain parameterized time-frequency transform suitable for active detection and the kernel function design for hyperbolic frequency modulated signal. Then, to suppress the direct wave interference in the received signal, the parameterized rotating time-frequency transform is used, along with the time-frequency domain filtering in order to separate the signal components, and then the echo signal is reconstructed via the inverse transform. Numerical simulation and marine experimental results show that the proposed algorithm not only can accurately estimate the time-frequency characteristics of the signal, effectively obtain the time-frequency gain of the hyperbolic frequency modulated continuous wave signal, and improve the detection performance, but also can effectively suppress direct wave interference.

Key words

hyperbolicfrequencymodulationsignal / continuous-wavesonar / parameterizedtime-frequencytransformation / time-frequencyfilter

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XUE Cheng, GU Yiming, GONG Zaixiao, LI Zhenglin. Parameterized Time-frequency Analysis in Continuous-wave Active Detection. Acta Armamentarii. 2022, 43(7): 1655-1666 https://doi.org/10.12382/bgxb.2021.0420

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