Joint RSMA and IDMA-Based NOMA system for downlink Communication in 5G and Beyond Networks

Aasheesh Shukla


Abstract—An efficient multiple access (MA) design must grapple with high throughput, massive connectivity requirements and heterogeneity of quality of service (QoS). Hence the interference among users in any multiple access scheme, should be treated judiously, i.e. neither full interference should be treated as noise nor full decode of interference. In this paper the new framework of multiple access is suggested in which Rate Splitting Multiple Access (power domain) and Interleave Division Multiple Access (code domain NOMA) are jointly proposed for fifth generation and beyond communication networks. The transmitter involves an IDMA, which became popular as an efficient realization technique for code domain non-orthogonal multiple access (NOMA) system as encoder and allows diversity in power allocations to the users. The proposed RS-IDMA (rate splitting based IDMA) relies on linearly precoded rate splitting with successive interference cancellation (SIC) to decode the interference in part and to treat interference as noise partially. For simulation purpose the downlink communication scenario has been considered where users faced diverse channel conditions. It provides room for further improvements in rate and QoS.


IDMA; NOMA ;rate splitting; SDMA;5G

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