TY - JOUR
T1 - Multi-Antenna Two-Way Relay Based Cooperative NOMA
AU - Lv, Lu
AU - Ye, Qiang
AU - Ding, Zhiguo
AU - Li, Zan
AU - Al-Dhahir, Naofal
AU - Chen, Jian
N1 - Funding Information:
Manuscript received October 15, 2019; revised March 31, 2020 and June 13, 2020; accepted June 16, 2020. Date of publication June 26, 2020; date of current version October 9, 2020. This work was supported in part by the National Natural Science Foundation of China (NSFC) under Grant 61901313, Grant 61771366, and Grant 61941105, in part by the NSFC for Distinguished Young Scholars under Grant 61825104, in part by the Natural Science Basic Research Plan of Shaanxi Province under Grant 2020JQ-306, in part by the Open Research Fund of National Mobile Communications Research Laboratory, Southeast University, under Grant 2020D07, in part by the China Postdoctoral Science Foundation under Grant BX20190264 and Grant 2019M650258, and in part by the National Sciences and Engineering Research Council of Canada under Grant RGPIN-2017-05853. This article was presented in part at the IEEE International Conference on Communications, Virtual, June 2020. The associate editor coordinating the review of this article and approving it for publication was A. Zaidi. (Corresponding author: Jian Chen.) Lu Lv is with the State Key Laboratory of Integrated Services Networks, Xidian University, Xi’an 710071, China, and also with the National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China (e-mail: [email protected]).
Publisher Copyright:
© 2002-2012 IEEE.
PY - 2020/10
Y1 - 2020/10
N2 - In this paper, we investigate a non-orthogonal multiple access (NOMA) assisted multi-Antenna two-way relay system, where multi-Antenna users apply NOMA to support bidirectional superposition transmission via multiple multi-Antenna relays. Specifically, we propose two cooperative strategies, namely multiple-Access broadcast NOMA and time division broadcast NOMA. For each of the two cooperative strategies, we devise a joint antenna-And-relay selection scheme to enhance the transmission reliability. Analytical expressions for the outage probability and diversity order are derived to evaluate the system performance achieved by the proposed cooperative strategies with the corresponding joint antenna-And-relay selection schemes. To further reduce the outage probability, we use the derived analytical results as objective functions to optimize the transmit power allocation under both cooperative strategies. Finally, extensive simulations are carried out to validate the accuracy of the derived analytical results. Our simulation results indicate that the proposed strategies significantly outperform existing benchmark strategies in terms of outage probability and diversity order.
AB - In this paper, we investigate a non-orthogonal multiple access (NOMA) assisted multi-Antenna two-way relay system, where multi-Antenna users apply NOMA to support bidirectional superposition transmission via multiple multi-Antenna relays. Specifically, we propose two cooperative strategies, namely multiple-Access broadcast NOMA and time division broadcast NOMA. For each of the two cooperative strategies, we devise a joint antenna-And-relay selection scheme to enhance the transmission reliability. Analytical expressions for the outage probability and diversity order are derived to evaluate the system performance achieved by the proposed cooperative strategies with the corresponding joint antenna-And-relay selection schemes. To further reduce the outage probability, we use the derived analytical results as objective functions to optimize the transmit power allocation under both cooperative strategies. Finally, extensive simulations are carried out to validate the accuracy of the derived analytical results. Our simulation results indicate that the proposed strategies significantly outperform existing benchmark strategies in terms of outage probability and diversity order.
KW - cooperative diversity
KW - joint antenna-And-relay selection
KW - multi-Antenna techniques
KW - Non-orthogonal multiple access
KW - outage probability
KW - two-way relay
UR - http://www.scopus.com/inward/record.url?scp=85092799526&partnerID=8YFLogxK
U2 - 10.1109/TWC.2020.3003615
DO - 10.1109/TWC.2020.3003615
M3 - Article
AN - SCOPUS:85092799526
SN - 1536-1276
VL - 19
SP - 6486
EP - 6503
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
IS - 10
M1 - 9127155
ER -