Non Orthogonal Multiple Access Based Interference Mitigation Schemes in the Emerging 5G Cellular Mobile Networks

Abstract

The emerging 5G mobile cellular network is envisaged to accommodate the increasing data traffic growth from the unprecedented proliferation of smart devices. The developments in the internet of things (IoT) have also led to the emergence of radio access technologies that can only be handled by a network with ultra-reliable low latency. The non- orthogonal multiple access (NOMA) technology is being proposed by 3GPP for 5G network because of its high spectrum efficiency. But interference management remains a major challenge in deploying NOMA techniques. This paper studies the working principles of NOMA techniques, reviews existing NOMA based interference mitigation schemes and proposes multi antenna zero-forcing beamforming vector, two user NOMA clustering algorithm and formulates an optimization problem for power allocation to mitigate inter-cluster and inter user interference in a NOMA based