NDLI: Optimal power allocation for non-orthogonal multiple access in wireless backhaul networks

Content Provider	IET Digital Library
Author	Yang, Xiaoqi Hua, Cunqing Xu, Wenchao Gu, Pengwenlong
Abstract	In this study, the authors adopt the non-orthogonal multiple access (NOMA) technique to improve the spectrum efficiency in the wireless backhaul networks, whereby the downlink and uplink NOMA techniques are applied for the backhaul and access links, respectively. Due to the coupling between the backhaul and access transmission stages, the transmission power should be carefully allocated in both stages so that the overall throughput can be maximised. They start with the single user equipment (UE) case and consider different scenarios and analyse the tradeoff between the access and backhaul links, and the optimal power allocation solutions are obtained accordingly. They then extend the analysis to the multi-UE case and formulate the optimal power allocation problem, which is solved using the Lagrangian dual decomposition algorithm. Simulation results demonstrate that the proposed schemes are effective in improving the throughput and outperforms the conventional orthogonal multiple access technique under different network settings.
Starting Page	1650
Ending Page	1657
Page Count	8
ISSN	17518628
Volume Number	14
e-ISSN	17518636
Issue Number	Issue 10, Jun (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/14/10
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2019.1002
Journal	IET Communications
Publisher Date	2020-03-17
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Access Link Access Transmission Stages Backhaul Link Downlink NOMA Technique Lagrangian Dual Decomposition Algorithm Multi-access System Multiple Access Communication MultiUE Case Network Settings Nonorthogonal Multiple Access Technique Optimal Power Allocation Problem Radio Link And Equipment Radio Network Radio Spectrum Management Resource Allocation Single User Equipment Case Spectrum Efficiency Telecommunication Power Management Transmission Power Uplink NOMA Technique Wireless Backhaul Network
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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