Shrestha Rabi, Guerboukha Hichem, Fang Zhaoji, Knightly Edward, Mittleman Daniel M
School of Engineering, Brown University, Providence, RI, USA.
Department of Electrical and Computer Engineering, Rice University, Houston, TX, USA.
Nat Commun. 2022 Jun 1;13(1):3045. doi: 10.1038/s41467-022-30723-8.
As the demand for bandwidth in wireless communication increases, carrier frequencies will reach the terahertz (THz) regime. One of the common preconceived notions is that, at these high frequencies, signals can radiate with high directivity which inherently provides more secure channels. Here, we describe the first study of the vulnerability of these directional links to jamming, in which we identify several features that are distinct from the usual considerations of jamming at low frequencies. We show that the receiver's use of an envelope detector provides the jammer with the ability to thwart active attempts to adapt to their attack. In addition, a jammer can exploit the broadband nature of typical receivers to implement a beat jamming attack, which allows them to optimize the efficacy of the interference even if their broadcast is detuned from the frequency of the intended link. Our work quantifies the increasing susceptibility of broadband receivers to jamming, revealing previously unidentified vulnerabilities which must be considered in the development of future wireless systems operating above 100 GHz.
随着无线通信中对带宽的需求不断增加，载波频率将达到太赫兹（THz）频段。一个常见的先入为主的观念是，在这些高频下，信号能够以高方向性辐射，这本质上提供了更安全的信道。在此，我们描述了对这些定向链路抗干扰脆弱性的首次研究，其中我们识别出了几个与低频干扰的通常考虑因素不同的特征。我们表明，接收器使用包络检波器使干扰器有能力挫败主动适应其攻击的尝试。此外，干扰器可以利用典型接收器的宽带特性实施拍频干扰攻击，这使它们能够优化干扰效果，即使其广播频率与预期链路的频率失谐。我们的工作量化了宽带接收器对干扰越来越高的敏感性，揭示了先前未被识别的漏洞，这些漏洞在开发未来运行在100 GHz以上的无线系统时必须加以考虑。
