This paper focuses on the design of a frequency modulated continuous wave (FMCW) dual-functional radar-communication (DFRC) system with low-loss radar detection performance, aiming at achieving a balance among communication rate, symbol error rate (SER), and out-of-band leakage. For what the communication functionality concerns, the constrained frequency hopping (C–FH) sequence mapping and up/down chirp are used to embed data, limiting the out-of-band leakage. We provide explicit rules for traversal-FH sequence to adjust the number of configurable frequency points within each chip, and limit the SER at the receiver. For the radar signal processing, after coherent processing and sampling, we proceed time-domain extension and range-bin phase compensation (TE-RBPC) according to the FH value, achieving the same range profile as an unmodulated (FMCW) without any influence from the FH sequences. The simulation results show that the proposed C–FH-chirp waveform reduces the out-of-band power leakage by 10 dB if compared with a phase shift keying scheme, and provides a 5 dB improvement in the signal noise ratio under the same SER if compared with an unconstrained FH-chirp scheme. Moreover, by comparing it with a scheme without compensation, the sidelobe amplitude of radar range profile in TE-RBPC scheme is reduced by about 39 dB.

中文翻译：

---

基于调频连续波利用约束跳频的双功能雷达通信

本文重点设计一种具有低损耗雷达检测性能的调频连续波（FMCW）双功能雷达通信（DFRC）系统，旨在实现通信速率、误码率（SER）和误码率（SER）之间的平衡。带外泄漏。对于通信功能而言，使用约束跳频 (C–FH) 序列映射和上/下线性调频脉冲来嵌入数据，从而限制带外泄漏。我们为遍历跳频序列提供了明确的规则，以调整每个芯片内可配置频点的数量，并限制接收器的SER。对于雷达信号处理，经过相干处理和采样后，我们根据FH值进行时域扩展和距离仓相位补偿（TE-RBPC），实现与未调制（FMCW）相同的距离剖面，而不受任何干扰的影响。 FH 序列。仿真结果表明，与相移键控方案相比，所提出的 C-FH-chirp 波形将带外功率泄漏降低了 10 dB，并且在相同 SER 下，信噪比提高了 5 dB。与无约束的 FH-chirp 方案相比。此外，与未补偿的方案相比，TE-RBPC方案的雷达距离廓线旁瓣幅度降低了约39 dB。