Research on Transmission Schemes of Massive MIMO Enabled SWIPT Systems

Abstract

Due to the development of the 5th generation network, the high power wireless devices, such as Internet of things network devices, have become part and parcel of some new domain. The simultaneous wireless information and power transfer (SWIPT) system can transmit information while harvesting energy. Although introducing massive multiple-input multiple-output (MIMO) technologies into SWIPT systems can reduce propagation loss, there still exists the bottleneck about a trade-off between energy and information, that is, the information decoding users suppress interference while the energy harvesting users take advantage of it. In this paper, we propose a time-division (TD) transmission scheme and a power-splitting (PS) one, which all can increase Rate-Energy (R-E) region, a novel method to evaluate the system performance. We find the optimal allocation factors for schemes, which are crucial in balancing data rate and harvest power. Simulation results demonstrate that the PS scheme has larger R-E region for massive MIMO enabled SWIPT system, which represents a better energy efficiency.