1. Downlink Multiple Input Multiple Output Mixed Sparse Code Multiple Access for 5G System
- Author
-
Guixia Kang, Cheng Yan, and Ningbo Zhang
- Subjects
General Computer Science ,MIMO-SCMA ,Computer science ,Reliability (computer networking) ,Code word ,Data_CODINGANDINFORMATIONTHEORY ,02 engineering and technology ,Base station ,0203 mechanical engineering ,Hardware_GENERAL ,Telecommunications link ,0202 electrical engineering, electronic engineering, information engineering ,Code (cryptography) ,General Materials Science ,Computer Science::Information Theory ,MIMO-MSCMA ,ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS ,General Engineering ,Codebook ,020206 networking & telecommunications ,020302 automobile design & engineering ,downlink ,MPA ,Bit error rate ,lcsh:Electrical engineering. Electronics. Nuclear engineering ,lcsh:TK1-9971 ,Algorithm - Abstract
For downlink multiple-input multiple-output-sparse code multiple access (MIMO-SCMA) system, the convergence reliability of the detected codeword in each decision process is unsatisfactory at the message passing algorithm receiver. To address this problem, a downlink MIMO-mixed sparse code multiple access (MIMO-MSCMA) system is proposed in this paper. For each user of the downlink MIMO-MSCMA, the transmitted codewords at different antennas come from different codebooks of MSCMA, respectively. On the other side, a novel basic complex multi-dimension constellation design is proposed in the MSCMA codebook design. Simulation results show that the bit error rate performance of the downlink MIMO-MSCMA outperforms than that of downlink MIMO-SCMA.
- Published
- 2018