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Multiple access is the base for increasing the capacity in multi-usercommunication networks. However, the growing demand for higher data rates andthe number of users who requires communication services has led to the scarcityof orthogonal resources in current wireless communications. On the other hand,integrating the satellite within terrestrial networks as an initiative of 3GPPsince its Release 15 entails the need for new forms of multiple access betweenterrestrial and non-terrestrial users. This paper studies constellation schemesas a new domain to enhance the state-of-the-art multiple-access techniques forfuture communication technologies employing non-coherent communications withmassive MIMO. In addition, we propose a hybrid model between the classic accessmethods such as Time Division Multiple Access (TDMA) or Frequency DivisionMultiple Access (FDMA), the emerging models of non-orthogonal multiple access(NOMA) and the proposed domain of the constellation based on non-coherentmassive multiple-input multiple-output (MIMO) schemes. This model is discussedfor different scenarios in satellite communications that help increase thesystem's capacity and avoid interference between terrestrial andnon-terrestrial users.

Multiple Access in Constellation Domain by Non-Coherent Massive MIMO