对SAR-GMTI的二维单音调制散射波干扰

doi:10.3969/j.issn.1001-506X.2020.08.07

Abstract

Abstract:

Considering the problem that the imaging position of synthetic aperture radar ground moving target indication (SAR-GMTI) of the traditional scattering-wave jamming is fixed, which makes the moving targets at specific position exposed, a compound scattering-wave jamming method based on two dimensional single tune modulation is proposed. According to the time-frequency coupling characteristics of linear frequency modulation signal, this method implements the frequency modulation of intercepted SAR signal in both range and azimuth profiles to control the jamming area, and the modulated jamming is amplified and projected to the metal scatterers. The analytical expression of the jamming imaging result against SAR-GMTI is deduced theoretically and the jamming performance is also analyzed in detail. The theoretical analysis and simulation results demonstrate that the proposed method can tackle the problem that the traditional scattering-wave jamming cannot cover the moving target at any position, and realize the flexible control of jamming imaging area by a fixed jammer and the jamming density by deployment of scatters. The SAR-GMTI can still be jammed even under large scouting error, which will provide some reference value for engineering application.

Key words: synthetic aperture radar, ground moving target indication, scattering-wave jamming, time-frequency coupling, single tune modulation

CLC Number:

TN95

Datong HUANG, Shiqi XING, Bo PANG, Yongzhen LI, Xuesong WANG. Scattering-wave jamming against SAR-GMTI based on two dimensional single tune modulation[J]. Systems Engineering and Electronics, 2020, 42(8): 1685-1694.

Figures/Tables 8

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参数名称	数值
信号载频/GHz	10
信号脉宽/μs	20
信号带宽/MHz	100
脉冲重复频率/Hz	756
天线间隔/m	1
合成孔径长度/m	140
平台飞行速度/(m·s^-1)	200
平台高度/m	5 000

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Scattering-wave jamming against SAR-GMTI based on two dimensional single tune modulation

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