In this paper we create a modeling scenario which includes an airborne imaging radar platform, receiving platform and an electronic countermeasure (ECM) platform whose goal is to introduce false target images. We also assume a high-resolution stripmap SAR model operating with several common types of UWB signals, as well as the newly proposed OFDM radar waveforms. OFDM-coded radar signals possess a viable quality of high pulse diversity potential, which can provide for robust performance in various jamming scenarios. In this paper, a method of jamming known as ‘deception’ is considered and a jammer model which aspires to generate false targets using intercepted radar signals is used. Two approaches to creating a radar signal by the jammer are considered: instantaneous frequency (IF) estimator and digital RF memory (DRFM)-based reproducer. In both cases, the jammer aims to create a copy of a valid target image — but located elsewhere in the observed target scene — via resending the radar signal at certain time intervals. Radar imaging simulation based on backprojection algorithm in presence of a deception jammer is performed for the cases of linear frequency modulated (LFM), short-pulse Gaussian, frequency-hopped (FH) and OFDM ultrawideband waveforms. The comparisons in ECCM performance of these signals are made based on the analysis of simulated imagery.
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