论文标题
将安全和高速通信整合到频率跳跃的MIMO雷达
Integrating Secure and High-Speed Communications into Frequency Hopping MIMO Radar
论文作者
论文摘要
基于频率跳跃（FH）MIMO雷达（FH-MIMO DFRC）的双功能雷达通信（DFRC）的符号率远高于雷达脉冲重复频率。但是，由于FH-MIMO雷达的空间照明，这种DFRC容易窃听。如何增强FH-MIMO DFRC的物理层安全性至关重要但尚未解决。在本文中，我们揭示了使用跳跃频率排列以实现安全和高速FH-MIMO DFRC的潜力。由于对空间角度的依赖，检测通信用户处的排列是具有挑战性的。我们提出了一系列基带波形处理方法，这些方法专门针对合法用户（BOB），同时几乎全向拼凑而成。我们从提出的方法处理的信号中发现了确定性符号规则。根据该规则，我们开发了在BOB的信息解码的准确算法。通过模拟确认，我们的设计可实现FH-MIMO DFRC的高物理层安全性，与现有设计相比，可以提高解码性能并减少雷达目标之间的相互干扰。
Dual-function radar-communication (DFRC) based on frequency hopping (FH) MIMO radar (FH-MIMO DFRC) achieves symbol rate much higher than radar pulse repetition frequency. Such DFRC, however, is prone to eavesdropping due to the spatially uniform illumination of FH-MIMO radar. How to enhance the physical layer security of FH-MIMO DFRC is vital yet unsolved. In this paper, we reveal the potential of using permutations of hopping frequencies to achieve secure and high-speed FH-MIMO DFRC. Detecting permutations at a communication user is challenging due to the dependence on spatial angle. We propose a series of baseband waveform processing methods which address the challenge specifically for the legitimate user (Bob) and meanwhile scrambles constellations almost omnidirectionally. We discover a deterministic sign rule from the signals processed by the proposed methods. Based on the rule, we develop accurate algorithms for information decoding at Bob. Confirmed by simulation, our design achieves substantially high physical layer security for FH-MIMO DFRC, improves decoding performance compared with existing designs and reduces mutual interference among radar targets.
