Open AccessSCMA-MIMO system with adaptation to the channel state
Author(s) -
Dmitriy Pokamestov,
Yakov V. Kryukov,
Eugeniy V. Rogozhnikov,
Islam Kanatbekuli,
Edgar M. Dmitriyev
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2134/1/012025
Subject(s) - computer science , mimo , space–time block code , mimo ofdm , channel (broadcasting) , orthogonal frequency division multiplexing , coding (social sciences) , spectral efficiency , spatial multiplexing , channel state information , bit error rate , multiplexing , electronic engineering , algorithm , telecommunications , wireless , mathematics , engineering , statistics
Sparse code multiple access (SCMA) is one of the promising implementations of non-orthogonal multiple access (NOMA) methods. SCMA provides high spectral efficiency and a large number of network resources. We describe a communication system with SCMA, space-time block coding (STBC), multiple input multiple output (MIMO) technology, and orthogonal frequency division multiplexing (OFDM). The architecture of such systems, including algorithms of formation and processing of signals is considered. A method for adapting signals to the state of the spatial channel transmission based on information about the matrix of channel coefficients is proposed. The application of such adaptation allows to compensate the influence of the channel and to reduce the probability of bit errors. We consider the bit error rate (BER) performance of the communication system in different channel models and show the effectiveness of the proposed methods.