Simulation of CO-NOMA communication channel

Authors: Kryukov Ya. V., Pokamestov D. A., Rogozhnikov E. V., Gromova Yu. S.

Annotation: The fifth generation mobile communication systems are in the final stages of development and standardization in 2019. One of the most important problems for developers – increasing of spectral efficiency, which is decided through the use of new methods of multiple access. At the initial stage of development of 5G, research groups proposed the use of nonorthogonal multiple access methods, and one of the most important of them is the non-orthogonal multiple access method with power channel multiplexing (NOMA). In the paper a modification of NOMA – using of an additional signal relay (CO-NOMA) is considered. It is shown that channel compression of the CO-NOMA methods contributes to an increase in the spectral efficiency of the system under certain conditions of the transmission channel. A mathematical simulation of the multiple communication channel of two users for two scenarios of the distribution of communication resources is carried out. A comparison of noise immunity and information efficiency of OFDMA, NOMA and CO-NOMA systems is given.

Keywords: ofdma, noma, co-noma, 5g, multiple access, signal retranslation