BP imaging and micro-Doppler analysis in bistatic ISAR system

Abstract

In this article we present the simulation of bistatic inverse synthetic aperture radar (B-ISAR) imaging by exploiting back projection (BP) algorithm. We show the whole signal processing steps from coherent processing to final image forming in a certain given bistatic system setup. BP algorithm is utilized in the simulation and the results are shown and discussed to verify the validation of BP imaging. Micro-Doppler effect is induced by the movement of additional parts of the target and may vary because of different observing angles. In a bistatic radar system whose transmitter and receiver are separate, the received signal is determined by both the angle respect to the transmitter and the receiver. In this paper we also present the micro-Doppler analysis of a simulated rotating point target in a bistatic radar setup. We calculate the rotation matrix relative to different coordinates and apply the Short Time Fourier Transform (STFT) to analysis the micro-Doppler effect.