Optimal Power Allocation for A Massive MIMO Relay Aided Secure Communication
Abstract
In this paper, we address the problem of optimal power allocation at the relay in two-hop secure communications under practical conditions. To guarantee secure communication during the long-distance transmission, the massive MIMO (M-MIMO) relaying techniques are explored to significantly enhance wireless security. The focus of this paper is on the analysis and design of optimal power assignment for a decode-and-forward (DF) M-MIMO relay, so as to maximize the secrecy outage capacity and minimize the interception probability, respectively. Our study reveals the condition for a nonnegative the secrecy outage capacity, obtains closed-form expressions for optimal power, and presents the asymptotic characteristics of secrecy performance. Finally, simulation results validate the effectiveness of the proposed schemes.
Cite
@article{arxiv.1508.07727,
title = {Optimal Power Allocation for A Massive MIMO Relay Aided Secure Communication},
author = {Jian Chen and Xiaoming Chen and Wolfgang Gerstacker},
journal= {arXiv preprint arXiv:1508.07727},
year = {2015}
}