Advanced NoMA Scheme for 5G Cellular Network: Interleave-Grid Multiple Access

New multiple access method has been recognized as an enabling technology for fifth-generation (5G) communication system. To fulfill the requirement on higher user density/network throughput, conventional orthogonal multiple access schemes have certain limitation on the user-capacity by only configuring the resource to one user. In this paper, an advanced non-orthogonal multiple access (NoMA) scheme is proposed, namely as interleave-grid multiple access (IGMA). Based on the bit level interleaving and symbol level grid-mapping process, the IGMA can provide tremendous user multiplexing capability as well as BLER performance. Joint detection and decoding technique is utilized at the receiver side considering both the complexity and the achievable performance. Moreover, the link level and system level simulation results are represented to verify the performance of IGMA, some initial hardware evaluation is also given.