Secrecy performance of massive MIMO relay‐aided downlink with multiuser transmission. Issue 9 (1st June 2019)

• Record Type: Journal Article
• Authors: Nguyen, Do Dung; Bao, Vo Nguyen Quoc; Chen, Qingchun
• Is Part Of: IET communications. Volume 13:Issue 9(2019)
• Page Start: 1207
• Page End: 1217
• Publication Date: 2019-06-01
• Subjects: array signal processing -- amplify and forward communication -- antenna arrays -- wireless channels -- relay networks (telecommunication) -- probability -- MIMO communication -- telecommunication security -- diversity reception; secure multiuser transmission -- massive multiple‐input multiple‐output relaying system -- base station -- multiusers -- amplify‐ relay station -- ‐forward relay station -- beamforming matrices -- maximum ratio -- MRC/MRT -- authors study -- massive MIMO relay‐aided downlink -- relay antennas -- eavesdropper rates -- secrecy performance -- channel state information imperfection -- predetermined secure outage probability -- outage secrecy rate -- user rate -- ZFR/ZFT -- zero‐forcing reception; Telecommunication systems -- Periodicals; Speech processing systems -- Periodicals; 621.38205
• DOI: 10.1049/iet-com.2018.5370
• Languages: English
• ISSNs: 1751-8628

Abstract

Abstract : In this study, the authors study secure multiuser transmission in a massive multiple‐input multiple‐output (MIMO) relaying system, where a base station sends its messages to multiusers via an amplify‐and‐forward relay station. Beamforming matrices of maximum ratio combining/maximum ratio transmission (MRC/MRT) and zero‐forcing reception/zero‐forcing transmission (ZFR/ZFT) at relay are considered. The authors derive exact and asymptotic expressions for user rate and outage secrecy rate for a predetermined secure outage probability of eavesdropper links with channel state information imperfection. They have shown that ZFR/ZFT is a better choice than MRC/MRT from the perspectives of secrecy performance. Furthermore, the asymptotic analysis is proposed to show that almost the eavesdropper rates in all cases are degraded as a number of relay antennas goes to infinity, and simultaneously the transmit power at the base station and the relay can be scaled down significantly. Finally, numerical results provide more insightful validity of the proposed analysis.