发表机构
RPTU University Kaiserslautern-Landau; German Research Center for Artificial Intelligence (DFKI); Technische Universität Berlin（莱茵兰-普法塔尔凯泽斯劳滕-兰道应用技术大学; 德国人工智能研究中心; 柏林工业大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文提出利用相位密钥和正切人工噪声随机化感知波形，以增强通感一体化系统的波形级安全性，有效降低窃听者的检测与锁定概率，同时保证合法接收器可靠恢复参考。
AI 中文摘要
本文研究了通感一体化（ISAC）中的波形级安全问题。我们不依赖空间波束成形或功率分配，而是利用相位密钥和应用于傅里叶曲线星座的正切人工噪声（AN）对感知波形本身进行随机化。协调的合法节点知晓密钥并恢复感知参考，而窃听者（Eve）仅观察到随机化波形，无法构建正确的相干匹配参考。我们考虑了一种搭载于无人机（UAV）上的窃听者，其具有主导的视距（LOS）链路，并充分利用有利的几何条件，包括一种旁路场景，其中窃听者同时监听直达波和回波侧以规避我们的设计。我们进一步考虑了一种更强的窃听者，其试图通过长期观测重建相位密钥；即便如此，残余的密钥失配会在结构上降低相关性和人工噪声消除效果，而准确的密钥恢复则需高昂的计算复杂度。数值结果表明，所提出的设计降低了窃听者使用非相干检测检测感知参考的概率，并且在旁路情况下，显著抑制了其正确延迟锁定概率，而合法接收器通过回波累积可靠地锁定参考。
英文摘要
This paper studies waveform-level security for Integrated Sensing and Communication (ISAC). Instead of relying on spatial beamforming or power allocation, we randomize the sensing waveform itself using phase keys and tangent Artificial Noise (AN) applied to a Fourier-curve constellation. Coordinated legitimate nodes know the key and recover the sensing reference, while Eve observes only a randomized waveform and cannot construct the correct coherent matched reference. We consider an Unmanned Aerial Vehicle (UAV)-mounted Eve with a dominant Line-of-Sight (LOS) link who fully exploits favorable geometry, including a bypass scenario where Eve listens to both the direct and echo sides to circumvent our design. We further consider a stronger Eve that attempts phase-key reconstruction from long-term observations; even then, residual key mismatch structurally degrades correlation and AN cancellation, while accurate key recovery incurs high computational complexity. Numerical results show that the proposed design reduces Eve's probability of detecting the sensing reference using non-coherent detection and, in the bypass case, substantially suppresses her correct-delay lock probability, while the legitimate receiver reliably locks onto the reference through echo accumulation.
Commentssubmitted to IEEE ICC 2027
