4.6 Space-Time Modulated 71-to-76GHz mm-Wave Transmitter Array for Physically Secure Directional Wireless Links
4.6 Space-Time Modulated 71-to-76GHz mm-Wave Transmitter Array for Physically Secure Directional Wireless Links
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4.6 用于物理安全定向无线链路的空时调制 71 至 76GHz 毫米波发射机阵列
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
K. Sengupta
中科院分区：
文献类型：
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作者：
Xuyang Lu;S. Venkatesh;Bingjun Tang;K. Sengupta
无线网络中的安全性传统上在物理层之上解决。随着5G、毫米波频谱和新网络架构中应用的预期激增，传统的数据加密方法可能无法扩展到能量受限的应用。因此，人们对物理层安全性的兴趣激增，其目的是通过利用无线通信信道的物理特性来赋予机密性，而不需要交换秘密的加密密钥[1]，[2]。TX/RX对之间的安全定向无线链路的想法是将信号信息保存在预期接收器所在的安全锥内，同时对其他任何地方的信号进行加扰以防止窃听。在相控阵列中，相同的时间数字信息被馈送到所有TX元件，尽管以不同的功率电平向所有方向发送相同的信息。这种信息可以用足够灵敏的接收机恢复（特别是在旁瓣处）。通过单独的天线辐射出I、Q的空间调制以及寄生元件的调制可以使星座在其他方向上失真[3]、[4]。然而，这种一对一（双射）映射允许窃听者进行潜在的解码，特别是使用各种信号处理和基于机器学习的分类技术。天线阵列中的时间调制可以通过以时间调制的方式将符号仔细映射到天线来并入这样的物理层安全性。
Security in wireless networks has traditionally been addressed above the physical layer. With the expected proliferation of applications in 5G, the mm-wave spectrum and new network architectures, traditional methods of data encryption may not be scalable for energy-constrained applications. Thus, there has been a surge of interest in physical layer security that aims to impart confidentiality by exploiting the physics of the wireless communication channel without the need for exchanging secret cryptographic keys [1], [2]. The idea of a secure directional wireless link between a TX/RX pair is to preserve the signal information within a secure cone where the intended receiver is located while scrambling signals everywhere else to prevent eavesdropping. In a phased array, the same temporal digital information is fed to all the TX elements, transmitting the same information to all directions albeit at different power levels. This information can be recovered (especially at the side lobes) with a sensitive enough receiver. Spatial modulation with I, Q radiated out through separate antennas, and modulation of parasitic elements can distort the constellation in other directions [3], [4]. However, this one-to-one (bijective) mapping allows potential decoding by the eavesdropper, particularly using various signal processing and machine-learning-based classification techniques. Time modulation in an antenna array can incorporate such physical layer security through careful mapping of symbols to antennas in a time-modulated fashion.
影响因子：
64.8
作者：
Ma, Jianjun;Shrestha, Rabi;Mittleman, Daniel M.
通讯作者：
Mittleman, Daniel M.