Energy Efficient Resource Allocation for Full-Duplex Enabled Cooperative NOMA with SWIPT Communication

Abstract

This paper investigates an energy efficient resource allocation problem for full duplex cooperative communication with non-orthogonal multiple access and simultaneous wireless information and power transfer (FD-CNOMA-SWIPT) network. There are two group users randomly deployed in a base station (BS) coverage area, the center users and the edge users. To satisfy the quality of service (QoS) of the edge user and increase the spectrum efficiency of the dense wireless network, the BS would schedule a center user to cooperatively communicating with the edge user in non-orthogonal multiple access. The center user receives both information and energy from BS simultaneously by using power splitting, and then decodes and forwards the edge user's data in full duplex mode, which brings in self-interference. To increase the energy harvest efficiency at the center user, we can use self-energy recycling technology at the center user. On the purpose of increasing system energy efficiency and spectrum efficiency of the network, we design a low complexity strategy to solve the problem of power allocation sub-problem and resource allocation sub-problem efficiently. The simulation results show our proposed strategy has 12% performance gain than the convention NOMA strategy and more than 95% performance gain over the half duplex (HD) strategy when the residual self-interference coefficient of the FD strategy is smaller than -60dB.