Impartial SWIPT-assisted user cooperation schemes

作     者：Chen, Weiyu Ding, Haiyang Wang, Shilian da Costa, Daniel Benevides Gong, Fengkui 

作者机构：College of Electronic Science and Technology National University of Defense technology Changsha China College of Information and Communication National University of Defense Technology Xi'an China Department of Computer Engineering Federal University of Ceará Sobral CE Brazil State Key Laboratory of Integrated Service Networks Xidian University Xi'an China 

出 版 物：《arXiv》 (arXiv)

年 卷 期：2019年

核心收录：

主　　题：Orthogonal frequency division multiplexing 

摘      要：In this paper, we propose an impartial simultaneous wireless information and power transfer (SWIPT)assisted cooperation mechanism for a non-orthogonal multiple access (NOMA) downlink scenario. Specifically, both a cell-center user and a cell-edge user apply the power-splitting technique and utilize the harvested energy to forward the other user s information on the premise of successful decoding of their own information. Both analytical and numerical results show that the proposed impartial user cooperation mechanism (IUCM) outperforms the traditional partial cooperation mechanism in terms of outage probability, diversity order and diversity-multiplexing trade-off (DMT). For comparison, we further incorporate the IUCM into an orthogonal frequency-division multiple access (OFDMA) framework, which is shown to preserve the same diversity order, while has a worse but more flexible DMT performance in comparison with the IUCM in the NOMA framework. Although the IUCM in OFDMA has a worse outage performance, it is proved that it has the same optimal system outage probability with the IUCM in NOMA when the relaying channel between the two users is error-free. Copyright © 2019, The Authors. All rights reserved.