Smeared Spectrum Jamming Suppression Algorithm Based on Multiple Orders 2D-FRFT

doi:10.3969/j.issn.1000-1093.2020.09.015

Abstract

Abstract: The existing smeared spectrum (SMSP) jamming suppression algorithms are all aimed at the echo signal within a pulse repetition interval (PRI). Those algorithms need to suppress the SMSP jamming of each PRI when dealing with the whole echo within a coherent processing interval (CPI). For linear frequency modulation pulse Doppler radar countering stand-off SMSP jamming, a jamming suppression algorithm based on multiple orders two-dimensional fractional Fourier transform(2D-FRFT) is proposed to process the echo within a CPI received by radar. The fractional characteristics of the jammed echo are analyzed. On this basis，the critical motion parameters of real target and jammer in the appearance of fractional migration are studied using the sampling-type DFRFT. The 2D fractional coverage windows are designed to remove the SMSP jamming. The simulated results show that the proposed algorithm can be used to simultaneously achieve the jamming suppression and target detection by processing a CPI echo without suppressing the SMSP jamming of each PRI.

Key words: pulseDopplerradar, smearedspectrumjamming, jammingsuppression, two-dimensionalfractionalFouriertransform

CLC Number:

ZHANG Liang， WANG Guohong， ZHANG Xiangyu， LI Siwen. Smeared Spectrum Jamming Suppression Algorithm Based on Multiple Orders 2D-FRFT[J]. Acta Armamentarii, 2020, 41(9): 1826-1836.

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