Physically Secure Sub-THz Wireless Links
Physically Secure Sub-THz Wireless Links
复制标题
物理安全的太赫兹以下无线链路
DOI：
10.1109/iccworkshops49005.2020.9145177
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Bingjun Tang
中科院分区：
文献类型：
--
作者：
K. Sengupta;Xuyang Lu;S. Venkatesh;Bingjun Tang
确保安全性正在成为实现 5G 及更高版本的大规模高速无线网络结构的重大挑战之一。特别是，在严格的能量限制和延迟要求下运行的多 Gbps 亚太赫兹和太赫兹无线链路中，实现网络层和应用层的安全性在计算上变得非常具有挑战性。为了解决这个问题，人们对物理层安全技术重新产生了兴趣，这些技术试图利用信道中的传播物理原理来合并安全功能。相控阵预计将成为此类亚太赫兹链路背后的基础构建块，它试图通过创建定向链路并最大限度地减少流向不需要的方向的泄漏功率来解决此类物理层安全问题。然而，此类阵列以这些离轴角传输的频谱和星座图被完全保留，允许窃听者使用足够灵敏的接收器来破坏通信信道。在本文中，我们演示了通过时空阵列架构将物理层安全性纳入太赫兹以下无线链路中。与相控阵不同，这些架构在不需要的方向上强制执行频谱混叠、信息丢失和星座扰乱，以减轻窃听者攻击。我们介绍了此类架构的基本工作原理，并讨论了各种调制技术及其预期的安全功能。我们还通过在定制设计的硅 IC 中完全集成的亚太赫兹阵列和工作频率为 76 GHz 的封装天线对它们进行了实验演示。所提出的架构可以实现未来大规模部署多 Gbps 无线网络，并在未来 5G 及更高版本中以亚太赫兹频率运行物理安全链路。
Ensuring security is emerging as one of the grand challenges towards realization of a large-scale and high-speed wireless network fabric for 5G and beyond. In particular, enabling security at the network layer and application layers becomes computationally very challenging in multi-Gbps sub-THz and THz wireless links operating under strict energy constraints and latency requirements. To address this, there has been renewed interest in physical layer security techniques that attempt to exploit the physics of propagation in the channel to incorporate security features. Phased arrays, that are expected to be the foundational building blocks behind such sub-THz links, attempt to address such physical layer security by creating directive links and minimizing leakage power to undesired directions. However, the spectrum and constellation transmitted by such arrays at these off-axis angles are fully preserved allowing eavesdroppers with sensitive enough receivers to compromise the communication channel. In this paper, we demonstrate incorporation of physical layer security in sub-THz wireless links through spatio-temporal array architectures. Unlike phased arrays, these architectures enforce spectral aliasing, loss of information and constellation scrambling at undesired directions to mitigate eavesdropper attacks. We present the fundamental operation principle of such architectures and discuss various modulation techniques and their intended security features. We also demonstrate them experimentally with fully integrated sub-THz arrays in custom designed silicon ICs and packaged antennas operating at 76 GHz. The presented architectures can enable future large-scale deployment of multi-Gbps wireless networks with physically secure links operating at sub-THz frequencies for future 5G and beyond.
影响因子：
64.8
作者：
Ma, Jianjun;Shrestha, Rabi;Mittleman, Daniel M.
通讯作者：
Mittleman, Daniel M.