Research on outage probability based power allocation method in millimeter wave system

Abstract

In recent years, millimeter wave communication technology has entered a period of rapid development, design framework of millimeter wave mobile communication system which combined large-scale antenna array and beamforming has been continuously strengthened. From the point of view of physical layer security, this paper analyzes the propagation characteristics, channel parameters and channel model of millimeter wave, and probes into the problem of passive eavesdropper in MISO communication scene. The main work includes: firstly, introduce the multipath propagation characteristics of millimeter wave, using beamforming and artificial noise broadcasting as a secure transmission mechanism. Secondly, a power allocation strategy based on artificial noise under the condition of inaccurate CSI is proposed to meet the QoSs (service quality requirement) constraints both at destination and eavesdropper so as to guarantee target secrecy probability. Both power constrained and power unconstrained systems are considered. The simulation results show that the outage probability-based method is simpler and more efficient than the existing second — order-statistic-based method.