Performance Analysis of Sparse Code Multiple Access Transceiver System for Massive Machine - Type Communication

The Sparse Code Multiple Access (SCMA) is one of the code-domain non-orthogonal multiple access schemes (CD-NOMA) employed in wireless communication systems. The SCMA is a multi-dimensional codebook based spreading procedure where the incoming bits of several users are mapped directly to multi-dimensional code words that are selected from sparse codebooks. The SCMA increases the spectral efficiency by allowing a large number of users to share the time and frequency resources which improves overall system performance. This has gained attention in the field of massive-machine type communication (mMtc) in 5G to satisfy huge demand on massive connectivity and data traffic. In this paper, the design and simulation of the SCMA system for the uplink scenario is carried out for 6 and 8 UEs. The Turbo coder is used for forward error correction and the Log-message passing algorithm (Log-MPA) is used as a detection scheme. The performance analysis of SCMA system is carrier out using block error rate (BLER) for 6 and 8 UEs.