关键词: 雷达嵌入式通信, 双选择性衰落信道, 正交时频空调制, 通信可靠性, 抗截获性能

Abstract: To address the issue of the sharp decline in reliability of radar-embedded communication (REC) over doubly selective fading channels, an orthogonal time-frequency space (OTFS) modulation-based REC method is proposed. By constructing a model and designing transceiver modules to integrate REC with OTFS, we introduce a communication information embedding method based on disturbance-resistant pilot design, as well as a reception approach combining waveform matching and symbol detection. This approach effectively enhances communication reliability while maintaining the waveform's low probability of intercept (LPI) performance. Simulation results demonstrate that the proposed method achieves favorable bit error rate (BER) performance and adapts well to the low signal-to-clutter ratio (SCR) characteristics of REC scenarios, providing valuable insights for improving the feasibility of REC technology in future engineering applications.

Key words: Radar Embedded Communication, Doubly Selective Fading Channel, Orthogonal Time-Frequency-Space Modulation, Communication Reliability, Anti-Interception Performance