SAR Scatter-Wave Jamming Multiplexing Communication: Based on Small Phase Modulation

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Abstract
This paper proposes a novel jamming multiplexing communication method for synthetic aperture radar (SAR) imaging in scatter-wave jamming (SWJ) scenarios. This method multiplexes communication information by modulating a weak phase in the slow time dimension of the SWJ signal. After receiving the signal, the ground communication station (CS) extracts the information according to the designed algorithm, thus achieving communication transmission. Specifically, a detailed signal model is established to describe the modulation and demodulation mechanism of the communication information. The impact of communication modulation on the SAR image is theoretically analyzed, and the bit error rate (BER) performance of the communication transmission is evaluated. Due to the use of high-gain matched filtering technology in the communication demodulation process, the proposed method achieves better communication BER performance in low signal-to-noise ratio (SNR) environments without significantly reducing jamming performance. Simulation results show that the proposed method achieves reliable information transmission while maintaining effective SWJ capability.

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