Frequency Asynchronous Noma In LEO Satellite Communication Systems

Abstract

In this paper, frequency asynchronous non-orthogonal multiple access (FA-NOMA) is applied to the low earth orbit (LEO) satellite communication (SatCom) system. There have been attempts to employ power domain NOMA (P-NOMA) to support large numbers of users in SatCom systems. However, P-NOMA is not beneficial in LEO SatCom environments where the power difference between users is small. In comparison, FA-NOMA utilizes intentional frequency offsets rather than environmental characteristics, making it a suitable technique for supporting large numbers of users in the LEO satellite environments.