Paper Info
Title
Spectral Efficiency Maximization for Multiuser MISO-NOMA Downlink Systems with SWIPT
Abstract
In this paper, we study the problem of jointly optimizing user pairing and beamforming design in multiuser multiple-input single-output (MU-MISO) non-orthogonal multiple access (NOMA) downlink systems with simultaneous wireless information and power transfer (SWIPT). Aiming at maximizing the achievable sum throughput subject to energy harvesting (EH) constraints, we propose a hybrid user pairing beamforming scheme (HBS), where two users with distinct channel conditions are optimally selected to perform user pairing. Moreover, we adopt a non-linear EH model for energy users to reveal their practical circuit characteristics. The sum throughput problem is formulated as a class of mixed-integer nonconvex optimization programming which is computationally prohibitive. To solve this challenging problem, we propose a low-complexity iterative algorithm, yet efficient, based on sequential convex approximation method to arrive at least the local optima. Numerical results are provided to demonstrate the performance improvement of the proposed HBS scheme over the multiuser beamforming one without user pairing, revealing to be an effective scheme for MU-MISO-NOMA downlink systems.
Year
DOI
Venue
2019
10.1109/GLOBECOM38437.2019.9014339
IEEE Global Communications Conference
Keywords
DocType
ISSN
Beamforming,energy harvesting,non-orthogonal multiple access (NOMA),successive convex approximation,nonconvex,user pairing,sum rate maximization
Conference
2334-0983
Citations 
PageRank 
References 
0
0.34
0
Authors
5
Name
Order
Citations
PageRank
Toan-Van Nguyen102.70
Van-Dinh Nguyen217923.75
Nhu Tri Do3758.03
Daniel Benevides da Costa4107586.79
Beongku An518725.19