An Improved Resource Allocation Scheme for 5G NOMA System

As a result of increasing demand on telecommunications services, networks suffer low speed and high latency. These seriously affect the performance of the network due to the presents of high burden on the existing multiplexing techniques such as Orthogonal Multiple Access (OMA) to deliver high speed data rates. Hence, the ever increasing demand for high speed and low latency data communications by mobile users define future features of networks to ease the burden on the existing multiple access techniques by significantly offering high data rates through multiplexing of multiple users over the same channel at the same time and frequency using Non Orthogonal Multiple Access (NOMA) in 5G systems. The research developed an improved resources allocation scheme for NOMA fifth Generation (5G) systems. The multiplexing of users on the same frequency band in NOMA makes it possible to have higher sum rate than the conventional OMA technique. This high sum rate can only be guaranteed through the use of efficient resources allocation scheme, so as to avoid high rate of interference and decoding errors. The research focuses on improving sum rate and coverage probability while considering the requirement for green communication in 5G. A multiple user’s downlink NOMA system with N sub-channels and 32 users which are uniformly distributed in a circle of diameter 500 meters is considered in this work.