Research on Uplink MIMO-SCMA Communication System

Sixing Lu, Duoying Zhang
2019 ICIC Express Letters  
Sparse code multiple access (SCMA) is a promising non-orthogonal multiple access scheme for future mobile communication. Combined with multiple input, multiple output (MIMO) technique, the spectrum efficiency of SCMA can be further improved. A joint factor graph method can be applied to the uplink MIMO-SCMA for more efficient signal detection. However, the corresponding decoding complexity of this system grows exponentially with the number of antennas and active users. To tackle this problem, a
more » ... reduced complexity decoding scheme for the uplink MIMO-SCMA system is proposed by exploiting the unbalance feature of the uplink virtual codebook. Simulation result shows that the proposed algorithm has much lower complexity compared to existing complexityreduced schemes with reasonable symbol error rate (SER).
doi:10.24507/icicel.13.07.575 fatcat:sy265vmqwrdixlvuruakffwxim