Secure mm-Wave Communications with Imperfect Hardware and Uncertain Eavesdropper Location

Abstract

This paper examines the secrecy performance of millimeter-wave (mm-Wave) communications with imperfect hardware and uncertain eavesdropper location. We consider a multiple-antenna source communicating with a single-antenna destination using masked beamforming to transmit the information signals with artificial noise (AN) in the presence of a passive eavesdropper (Eve). For this system, we derive new expressions for the secrecy outage probability (SOP) and secrecy throughput with mm-Wave multipath propagation under slow-fading channel conditions and hardware imperfections. Based on this, optimal power allocation (OPA) solutions are derived for the information and AN signals aimed at minimizing the SOP and maximizing the secrecy throughput. Our results reveal that it is non-trivial to achieve an OPA solution for the general scenario of imperfect hardware. We also highlight that our proposed masked beamforming with OPA scheme significantly enhances the secrecy throughput compared with the benchmark schemes of maximal-ratio transmission and equal power allocation.

References in corpus (9)

• Massive MIMO for Next Generation Wireless Systems
• Scaling up MIMO: Opportunities and Challenges with Very Large Arrays
• Principles of Physical Layer Security in Multiuser Wireless Networks: A Survey
• Millimeter Wave Beamforming for Wireless Backhaul and Access in Small Cell Networks
• Massive MIMO Systems with Non-Ideal Hardware: Energy Efficiency, Estimation, and Capacity Limits
• Physical Layer Security for Massive MIMO: An Overview on Passive Eavesdropping and Active Attacks
• Joint Optimization of a UAV's Trajectory and Transmit Power for Covert Communications
• On the Design of Artificial-Noise-Aided Secure Multi-Antenna Transmission in Slow Fading Channels
• Millimeter Wave Beam Alignment: Large Deviations Analysis and Design Insights