TY - GEN
T1 - Joint Beamforming and Time Duration Optimization for Battery-Free-Multi-Antenna-Relay-Assisted WPCN
AU - Yang, Fan
AU - Xu, Wenjun
AU - Lee, Chia-Han
AU - Feng, Zhiyong
AU - Lin, Jiaru
PY - 2018/1/1
Y1 - 2018/1/1
N2 - 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 multi- antenna 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.
AB - 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 multi- antenna 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.
KW - Terms?WPCN
KW - battery-free multi-antenna.
KW - energy beamforming
KW - multi-antenna relay
KW - time duration allocation
UR - http://www.scopus.com/inward/record.url?scp=85059491343&partnerID=8YFLogxK
U2 - 10.1109/GLOCOM.2018.8647656
DO - 10.1109/GLOCOM.2018.8647656
M3 - Conference contribution
AN - SCOPUS:85059491343
T3 - 2018 IEEE Global Communications Conference, GLOBECOM 2018 - Proceedings
BT - 2018 IEEE Global Communications Conference, GLOBECOM 2018 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2018 IEEE Global Communications Conference, GLOBECOM 2018
Y2 - 9 December 2018 through 13 December 2018
ER -
