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: | 1-二月-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 |
顯示於類別: | 期刊論文 |