Influence of azimuth-modulation jamming on high-resolution wide-swath multi-channel SAR
Multi-channel synthetic aperture radar(SAR)can use azimuthal multi-channel reconstruction processing to resolve the Doppler ambiguities,and obtain high-resolution wide-swath SAR images.Aiming at the special multi-channel reconstruction processing way,the influence of traditional SAR azimuth-modulation jamming on high-resolution wide-swath multi-channel SAR is studied,including Doppler-modulation jamming and pulse-delay-modulation forwarding jamming,to provide a theoretical basis for high-resolution wide-swath multi-channel SAR jamming decision.The theoretical analysis indicates that the Doppler-modulation jamming signal will generate equally-spaced spurious targets in the azimuth after imaging processing,and the amplitudes of the false targets are controlled by the combined sinusoidal function and matched filter loss associated with the Doppler modulation frequency.While the pulse-delay-modulation signal will only generate a jamming target after imaging,the position of the target is only related to the number of delayed pulses.The simulation experi-ments verify the correctness of the theoretical analysis.
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