Paper Info
Title
Joint Beamforming And Power-Splitting Optimization For Swipt-Enabled Miso Full-Duplex Two-Way Cooperative Noma Systems
Abstract
In this paper, a multiple-input single-output (MISO) full-duplex two-way cooperative non-orthogonal multiple access (NOMA) system is considered. The relay is energy-restricted and may not accomplish the information exchange between two end users. To address this problem, simultaneous wireless information and power transfer (SWIPT) is proposed, which employs power splitting (PS) at the relay to harvest energy. To maximize the harvested energy of the relay under QoS and power constraints, a joint optimization problem of the beamforming vectors and the PS ratio is formulated. The problem is nonconvex, and the original problem is transformed into a tractable form by applying the semidefinite relaxation (SDR) technique. Then a bilevel programming (BLP) based method is proposed to obtain an approximately optimal solution. Moreover, to reduce the computational complexity, a successive convex approximation (SCA)-based iterative algorithm is developed to derive a suboptimal solution. Numerical results show that our proposed strategy significantly enhances the energy harvesting performance compared with the existing transmission strategies. (C) 2020 Elsevier B.V. All rights reserved.
Year
DOI
Venue
2021
10.1016/j.phycom.2020.101257
PHYSICAL COMMUNICATION
Keywords
DocType
Volume
Beamforming, Full-duplex (FD), Non-orthogonal multiple access (NOMA), Simultaneous wireless information and power transfer (SWIPT), Two-way relay (TWR)
Journal
45
ISSN
Citations 
PageRank 
1874-4907
0
0.34
References 
Authors
0
4
Name
Order
Citations
PageRank
Zhiguo Xu1112.01
Shuai Wang210.69
Dan Liu3258.89
Zhigang Wen400.34