Non-Orthogonal Multiple Access in Two-Hop Wireless Powered Communication Networks

This letter studies the resource allocation problem of sum rate maximization in wireless powered communication networks (WPCNs) with non-orthogonal multiple access (NOMA) that satisfy minimum data rate requirements per user. Firstly, we derive closed-form solutions for the time-splitting ratio and p...

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Bibliographic Details
Published in:IEEE wireless communications letters 2020-09, Vol.9 (9), p.1398-1402
Main Authors: de Carvalho, J. A., da Costa, D. B., Lima, F. Rafael M., Oliveira, R., Dias, U. S.
Format: Article
Language:English
Subjects:
Approximation
Communication networks
Communications networks
Linear programming
Newton method
NOMA
Nonorthogonal multiple access
Optimization
power allocation
Quality of service
Resource allocation
Resource management
Wireless communication
Wireless communications
Wireless networks
WPCN
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Summary:This letter studies the resource allocation problem of sum rate maximization in wireless powered communication networks (WPCNs) with non-orthogonal multiple access (NOMA) that satisfy minimum data rate requirements per user. Firstly, we derive closed-form solutions for the time-splitting ratio and power allocation coefficients that maximize the approximated sum rate NOMA expression. Then, we use the solution of the approximated problem as the starting point for solving the original problem through Newton's method. Simulation results show the effectiveness of the proposed approximation as well as the fast convergence of the optimal solution.
ISSN:2162-2337
2162-2345
DOI:10.1109/LWC.2020.2992049