Positioning Optimization for Sum-Rate Maximization in UAV-Enabled Interference Channel

被引：25

作者：

Li, Xinmin ^{[1
]}

Xu, Jie ^{[2
,3
]}

机构：

[1] Southwest Univ Sci & Technol, Sch Informat Engn, Mianyang 621000, Sichuan, Peoples R China

[2] Guangdong Univ Technol, Sch Informat Engn, Guangzhou 510006, Guangdong, Peoples R China

[3] Southeast Univ, Natl Mobile Commun Res Lab, Nanjing 210000, Jiangsu, Peoples R China

来源：

IEEE SIGNAL PROCESSING LETTERS | 2019年 / 26卷 / 10期

关键词：

Unmanned aerial vehicle (UAV); three-dimensional (3D) positioning optimization; interference channel; sum-rate maximization; power control; COMMUNICATION; DESIGN;

D O I：

10.1109/LSP.2019.2934579

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This letter studies an unmanned aerial vehicle (UAV)-enabled two-user interference channel, in which two ground users send individual messages to their respective UAVs in the sky. By considering probabilistic line-of-sight (LoS) channel models, we jointly optimize the two UAVs' three-dimensional (3D) positioning locations and the two users' power control, to maximize their sum-rate throughput. Although this problem is non-convex and difficult to solve in general, we obtain the optimal solution by decoupling the positioning optimization and power control. The optimal solution shows that if the signal-to-noise-ratio (SNR) rho is high, then the two users should take turns to transmit at the maximum power in an on-off manner and each UAV is positioned exactly above the associated user. By contrast, if rho is low and/or the two users' distance D is large, then the two users should transmit simultaneously at the maximum power, and each UAV should be positioned away from the two users for interference mitigation.

引用

页码：1466 / 1470

页数：5

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