Universal Filtered Multi-carrier Based Multi-user Simultaneous Wireless Information and Power Transfer Downlink System

Abstract

In this paper, we study the model design for realizing simultaneous wireless information and power transmission (SWIPT) in multi-user universal filtered multi-carrier (UFMC) downlink system, which can transfer energy as well as information at the same time. Different from orthogonal frequency division multiplexing (OFDM) which filters the whole band, UFMC filters a serial of subcarriers and does not need cyclic prefix (CP), thus it can enhance the spectrum efficiency. So combining UFMC and SWIPT technology can improve information rate as well as harvested energy. To achieve the rate-energy region, we jointly optimize the power allocation strategy as well as the subcarrier allocation scheme in a multiuser UFMC downlink system by Lagrange duality method. At the receiver, the power splitting (PS) method is used to coordinate the energy harvesting (EH) with information decoding (ID) process. The simulation results show that UFMC-based SWIPT system outperforms OFDM-based SWIPT system under the same channel condition.