On the Secrecy Capacity of 5G MmWave Small Cell Networks

In the next generation 5G millimeter-wave (mmWave) small cell networks, mmWave communication will play a critical role, as there is a lot more open bandwidth in high frequencies. The rapid growth of mmWave systems poses a variety of challenges in PHY security. This article investigates those challenges in the context of several 5G mmWave small cell communication technologies, including MIMO, NOMA, and so on. In particular, we introduce an RT-based 5G mmWave small cell communication channel model, and reveal that the secrecy capacity in mmWave band widely depends on the richness of the RF environment through numerical experiments.