標題: Optimal Power Control for NOMA Wireless Networks With Relays
作者: Gau, Rung-Hung
Chiu, Hsiao-Ting
Liao, Chien-Hsun
Wu, Chi-Lun
電信工程研究所
Institute of Communications Engineering
關鍵字: Non-orthogonal multiple access;wireless relays;power control;optimization
公開日期: 1-Feb-2018
摘要: In this letter, we propose a novel approach for dynamically selecting an optimal relay mode and optimal transmission power levels in non-orthogonal multiple access wireless networks with relays. To maximize the network throughput, the proposed approach alternates between the one-relay mode and the two-relay mode based on channel state information. For the two-relay mode, we derive novel closed-form results on optimal power control. Unlike in a conventional one-hop network, it is not always optimal to allocate all power to the relay with the largest channel gain in the studied two-hop network. Based on the closed-form results, one could determine the optimal power levels quickly. Simulation results show that the proposed approach could significantly increase the network throughput.
URI: http://dx.doi.org/10.1109/LWC.2017.2751041
http://hdl.handle.net/11536/144556
ISSN: 2162-2337
DOI: 10.1109/LWC.2017.2751041
期刊: IEEE WIRELESS COMMUNICATIONS LETTERS
Volume: 7
起始頁: 22
結束頁: 25
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