Optimal Power Allocation for A Massive MIMO Relay Aided Secure Communication

Jian Chen; Xiaoming Chen; Wolfgang Gerstacker

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arXiv · 1508.07727

Optimal Power Allocation for A Massive MIMO Relay Aided Secure Communication

Jian Chen·Xiaoming Chen·Wolfgang Gerstacker

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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.

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Jian Chen, Xiaoming Chen, Wolfgang Gerstacker. 2015-08-31. Optimal Power Allocation for A Massive MIMO Relay Aided Secure Communication. https://arxiv.org/abs/1508.07727

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