One-bit Multi-modality Jamming Method against SAR

Abstract

This paper proposes a one-bit multi-modality jamming method against Synthetic Aperture Radar (SAR). After being intercepted by the jammer, the SAR signal is quantized to one-bit sampling data through comparison with the single-frequency threshold. Compared with the conventional deceptive jamming method that uses the high-precision samples of a SAR signal to generate false targets with high fidelity, one-bit quantization only preserves the symbolic information of the signal, which reduces the data width of the sampled data and consequently simplifies the system, improves efficiency, and reduces the cost. Meanwhile, abundant harmonic components have been introduced into intercepted SAR signals by one-bit quantization based on the Single-Frequency Threshold (SFT). The SFT can be generalized to various thresholds by reasonably designing the threshold parameters, including amplitude, frequency, and phase. Harmonics with different characteristics can be effectively used by purposely designed thresholds. Then, ingenious jamming is achieved, which can manifest a single modality or combine multiple jamming modalities among single-target deceptive jamming, multi-target deceptive jamming, radio-frequency jamming, and noise-like jamming and has modality agility. The performance of the proposed method under different jamming modes is quantitatively analyzed through simulation experiments, verifying its effectiveness.

Keywords

• synthetic aperture radar (sar)
• multi-modality jamming
• one-bit quantization
• single-frequency threshold (sft)