Min-SINR Maximization with DL SWIPT and UL WPCN in Multi-Antenna Interference Networks

Abstract

A novel multicell communication and energy harvesting scheme is proposed, in which downlink (DL) simultaneous wireless information and power transfer (SWIPT) and uplink (UL) wireless powered communication network (WPCN) concepts are jointly considered. Specifically, a DL beamforming with energy harvesting and UL power allocation (PA) scheme is proposed, where each cell is composed of a base station (BS) with multiple antennas and powerlimited users each with single antenna. The joint optimization of DL beamforming vector design and UL PA is known to be challenging due to unpredictable future channel conditions, and thus we propose an efficient cascaded design for the DL and UL problems in pursuit of maximizing the minimum DL and UL signal-to-interference-plusnoise ratios (SINRs). Simulation results show that the proposed scheme achieves higher minimum DL and UL SINRs region as well as higher UL energy efficiency than the existing schemes.