2015/08/04 by Baicen Xiao, Xiao, Baicen, Kexin Xiao +9
Computer Science · Engineering · Mathematics · #Advanced Wireless Communication Techniques #Advanced Wireless Communication Technologies #Error Correcting Code Techniques #FOS: Computer and information sciences #Information Theory (cs.IT) #cs.IT #math.IT
paper · pdf · doi:10.48550/arxiv.1508.00680
arxiv created 2015/08/04 · openalex publication_date 2015/08/04 · arxiv updated 2015/08/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Sparse code multiple access (SCMA) is a promising multiplexing approach to achieve high system capacity. In this paper, we develop a novel iterative detection and decoding scheme for SCMA systems combined with Low-density Parity-check (LDPC) decoding. In particular, we decompose the output of the message passing algorithm (MPA) based SCMA multiuser detection into intrinsic part and prior part. Then we design a joint detection and decoding scheme which iteratively exchanges the intrinsic information between the detector and the decoder, yielding a satisfied performance gain. Moreover, the proposed scheme has almost the same complexity compared to the traditional receiver for LDPC-coded SCMA systems. As numerical results demonstrate, the proposed scheme has a substantial gain over the traditional SCMA receiver on AWGN channels and Rayleigh fading channels.