DOA Estimation of Wideband Linear Frequency Modulated Pulse Signals Based on Fractional Fourier Transform

WANG Rui;MA Yan

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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 ›› 2014, Vol. 35 ›› Issue (3) : 421-427. DOI: 10.3969/j.issn.1000-1093.2014.03.020
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DOA Estimation of Wideband Linear Frequency Modulated Pulse Signals Based on Fractional Fourier Transform

  • WANG Rui, MA Yan
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Abstract

A new method for a center frequency estimation based on fractional Fourier transform (FRFT) is proposed for the case that the time width of wideband linear frequency modulated pulse signals is not equalto the width of observation time. The MUSIC algorithm for direction of arrival (DOA) estimation in the fractional Fourier domain is improved. Based on the energy-concentrated properties of linear frequency modulated signal in the fractional Fourier domain, the proposed approach is used to analyze the change of center frequency with the position variation of pulse signal in observation time. And the array manifold vector of fractional Fourier domain is constructed using the MUSIC algorithm for DOA estimation. Numericalsimulation shows the effectiveness of the algorithm for DOA estimation. Then the influence of the SNR and time width in observation time on DOA estimated results is analyzed.

Key words

information processing / fractional Fourier transform / direction of arrival estimation / wideband linear frequency modulated pulse signal / center frequency / pulse signal

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WANG Rui, MA Yan. DOA Estimation of Wideband Linear Frequency Modulated Pulse Signals Based on Fractional Fourier Transform. Acta Armamentarii. 2014, 35(3): 421-427 https://doi.org/10.3969/j.issn.1000-1093.2014.03.020

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