为解决雷达嵌入式通信在双选择性衰落信道中可靠性急剧下降的问题，本文提出一种基于正交时频空调制的雷达嵌入式通信方法。通过构建模型、设计收发模块将REC与OTFS相结合，提出了基于抗扰动导频设计的通信信息嵌入方法、波形匹配与符号检测相结合的接收方法，可在保持波形抗截获性能的同时有效提升通信可靠性。仿真结果表明，该方法具有良好的误码率性能，且适应REC通信场景低信杂比的特点，为提升REC技术在未来工程应用中的可行性提供了有益探索。

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.