NDLI: Energy efficiency maximisation in wireless powered networks with cooperative non-orthogonal multiple access

Content Provider	IET Digital Library
Author	Zhang, Yongqiang He, Jianbo Guo, Songtao Wang, Fei
Abstract	In the 5G wireless networks, non-orthogonal multiple access (NOMA) is a promising paradigm to improve its high spectrum efficiency. This study considers applying simultaneous wireless information and power transfer (SWIPT) technique to cooperative NOMA wireless networks, where energy-constrained relay nodes harvest the ambient radio-frequency signal and use the harvested energy to forward the packets from sources to destinations. To this end, the authors first formulate the energy-efficient cooperative transmission problem for SWIPT in NOMA with imperfect channel state information. Then, by exploiting alternative optimisation and dual decomposition, they design an iterative algorithm for power allocation and power splitting (PS) to solve the non-convex optimisation problem. The authors' simulation results reveal that the proposed algorithm can converge within a few iterations and yield optimal system energy efficiency.
Starting Page	2374
Ending Page	2383
Page Count	10
ISSN	17518628
Volume Number	12
e-ISSN	17518636
Issue Number	Issue 18, Nov (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/12/18
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2018.5056
Journal	IET Communications
Publisher Date	2018-08-16
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	5G Mobile Communication 5G Wireless Networks Alternative Optimisation Ambient Radio-frequency Signal Amplify And Forward Communication Convex Programming Cooperative Communication Dual Decomposition Energy Conservation Energy Efficiency Maximisation Energy Harvesting Energy-constrained Relay Node Harvested Energy High Spectrum Efficiency Imperfect Channel State Information Interpolation And Function Approximation Iterative Algorithm Iterative Method Mobile Radio System Multi-access System Multiple Access Communication NOMA Wireless Network Nonconvex Optimisation Problem Nonorthogonal Multiple Access Numerical Analysis Optimal System Energy Efficiency Optimisation Technique Power Allocation Power Splitting Radio Receiver Relay Network Signal Processing And Detection Simultaneous Wireless Information SWIPT Telecommunication Wireless Channel Wireless Powered Network
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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