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该论文提出了一种基于时空调制的71-76GHz毫米波发射阵列，用于实现物理层安全的定向无线链路。通过在发射阵列中引入时空调制，在不依赖加密密钥的情况下利用信道物理特性保障通信机密性，解决了传统加密方法在5G毫米波能量受限场景下不可扩展的问题。
Xi'an Jiaotong University, Xi'an, China *Equally-Credited Authors (ECAs) 1 2 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
Xuyang Lu*1, Suresh Venkatesh*1, Bingjun Tang2, Kaushik Sengupta1
Princeton University, Princeton, NJ