Abstract
In this paper, we propose a novel orthogonal frequency-division multiplexing (OFDM) waveform with low probability of intercept (LPI) and the corresponding synthetic aperture radar (SAR) processing algorithm. The OFDM waveform has a random spectrum for each pulse, making it a good candidate for low probability of intercept system implementation. The SAR processing algorithm eliminates the influence of random spectrum and uses matched filtering, which has the same signal-to-noise ratio (SNR) gain as LFM signals. Simulation results illustrating the spectrogram of the proposed OFDM waveform and the algorithm's performance in 2-D SAR imaging scenarios are presented and discussed.
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