Spectral- and Energy-Efficiency of Multi-Pair Two-Way Massive MIMO Relay Systems Experiencing Channel Aging

IEEE Access

卷:7

Xu Li¹  Huisheng Zhang¹  Wei Chen²  Lixin Li³  Lie-Liang Yang⁴  Zhu Han⁵  Jiao He⁶  Miao Pan⁶ 

[1] Department of Electrical and Computer Engineering, University of Houston, Houston, TX, USA;

[2] School of Electronics and Computer Science, The University of Southampton, Southampton, U.K.;

[3] School of Electronics and Information, Northwestern Polytechnical University, Xi&x2019;

[4] Xi&x2019;

[5] an ASN Technology Group Co., Ltd., Xi&x2019;

[6] an, China;

关键词: Massive MIMO;    two-way relay;    full-duplex;    half-duplex;    channel aging;    maximum-ratio combining/maximum-ratio transmission;   

DOI  :  10.1109/ACCESS.2019.2908882

来源: DOAJ

【 摘 要 】

In this paper, we demonstrate the impact of channel aging on the spectral- and energy-efficiency performance of the multi-pair two-way massive MIMO relay (MTW-MMR) systems, where massive antennas are deployed at the relay and the amplify-and-forward (AF) protocol is operated. By assuming the maximum-ratio combining/maximum-ratio transmission (MRC/MRT) or zero-forcing reception/ zero-forcing transmission (ZFR/ZFT) relaying processing, we analyze the spectral efficiency (SE) and energy efficiency (EE) of the MTW-MMR systems experiencing both imperfect channel estimation and channel aging based on the four proposed power-scaling schemes. Furthermore, we compare the performance of the full-duplex (FD)-assisted MTW-MMR systems with that of the half-duplex (HD)-assisted MTW-MMR systems, showing that the FD mode outperforms the HD mode with the interference level not exceeding -15 dB. Our studies show that channel aging may significantly degrade the achievable performance in terms of SE and EE. However, the inter-pair interference caused by the other user pairs and the self-interference can be effectively mitigated by the MRC/MRT processing or ZFR/ZFT processing at the relay.

【 授权许可】

Unknown