Analyzing the performance of beam-forming-based covert wireless communication with noise uncertainty

Abstract

A scheme of downlink covert wireless communication based on complex Gaussian random coding and beam forming was adopted in order to establish covert wireless communication in a Rayleigh fading environment with noise uncertainty. More importantly, however, the effectiveness of covert wireless communication was examined.Using the hypothesis test theory, the covert probability of communication was first examined.Second, the best detection threshold for the illegal detecting party was established and demonstrated. Additionally, the closed expressions for the system's average covert probability, connection interruption probability, and covert throughput were also found.Ultimately, the best goal of the system's maximum covert throughput was reached by simultaneously designing the transmission power and target covert rate. The related step-search technique was provided.