A coordinated operation access scheme for 5G cellular systems

Abstract

In this paper, we focus on non-orthogonal multiple access (NOMA) network with power-domain user multiplexing at the transmitter side and successive interference cancellation (SIC) on the receiver side. The main problem presented in NOMA network is the design of the precoder. It has to be applied to users with weak channel conditions to effectively mitigate interference between cells. We propose a coordinated operation access scheme between OMA and NOMA that removes the precoder and increases the performance of the system. The channel gain is analyzed by order statistics obtaining its probability density function. System level simulation results are provided. We show, under multiple configurations, that the transmission rate achieved by our scheme is higher by more than 42% compared to NOMA on the edge of the cell.