標題: Joint Beamforming and Time Duration Optimization for Battery-free-Multi-Antenna-Relay-Assisted WPCN
作者: Yang, Fan
Xu, Wenjun
Lee, Chia-Han
Feng, Zhiyong
Lin, Jiaru
交大名義發表
National Chiao Tung University
關鍵字: WPCN;multi-antenna relay;time duration allocation;energy beamforming;battery-free multi-antenna
公開日期: 1-一月-2018
摘要: This paper studies an energy beamforming and time duration joint optimization problem for maximizing the sum-rate of a battery-free-multi-antenna-relay-assisted wireless powered communication network (WPCN). The considered problem is non-convex due to the strongly coupled optimization variables. By introducing new optimization variables and reformulating the problem into a convex problem, the optimal solution is obtained based on convex optimization methods. Furthermore, an alternate iteration algorithm is proposed by decoupling the problem into two subproblems, and a semi-closed form solution of the optimal energy beamforming matrix is derived with given time allocation. Simulation results indicate that the proposed battery-free multiantenna relay architecture can deliver a significant sum-rate gain for the WPCN. In addition, the proposed suboptimal algorithm only has 5% sum-rate loss compared to the optimal solution.
URI: http://hdl.handle.net/11536/152468
ISBN: 978-1-5386-4727-1
ISSN: 2334-0983
期刊: 2018 IEEE GLOBAL COMMUNICATIONS CONFERENCE (GLOBECOM)
起始頁: 0
結束頁: 0
顯示於類別:會議論文