基于Verilog的SCMA系统编码器和译码器设计  

Design of Verilog-based encoder and decoder for SCMA system

作　　者：王甜 熊兴中 WANG Tian;XIONG Xingzhong(School of Automation&Information Engineering,Sichuan University of Science&Engineering,Zigong 643000,China)

机构地区：[1]四川理工学院自动化与信息工程学院,四川自贡643000

出　　处：《现代电子技术》2018年第23期13-17,共5页Modern Electronics Technique

基　　金：四川理工学院研究生创新基金(y2016042);人工智能四川省重点实验室开放基金项目(2017RZJ01);企业信息化与物联网测控技术四川省高校重点实验室开放基金项目(2017WZJ01)~~

摘　　要：稀疏码多址接入SCMA是典型的码域非正交多址接入技术,它作为第五代移动通信5G的一种空口候选技术,能够支撑"海量"终端设备的接入,并减小传输延迟,同时还能实现节能降耗。SCMA编码器将调制和扩频统一为码本,用户信息直接通过码本的编码就能实现调制和多址双过程。码字的稀疏性使得SCMA译码器可以使用消息传递算法MPA,以较低的复杂度来逼近最大后验概率检测器性能。基于SCMA的技术原理,运用Verilog针对SCMA的发送端和接收端进行仿真设计。实验仿真结果表明,基于Verilog的SCMA系统编码器和译码器的设计与理论分析一致,达到了设计要求。The sparse code multiple access(SCMA)is a typical code-domain non-orthogonal multiple access(NOMA)technology.As a candidate technology of the 5th generation mobile communication(5G),the SCMA technology can support the access of massive terminal devices,reduce the transmission delay,and realize the energy saving and consumption reduction.The modulation and spread spectrum are unified as codebook by means of SCMA encoder,and the modulation and multiple access processes of user information are realized by coding of the codebook.The sparsity of codon makes the SCMA decoder use the message passing algorithm(MPA),which can approximate to the maximum posterior probability detector performance with low complexity.On the basis of the technical principle of SCMA,the simulation design was carried out for the transmitting end and receiving end of SCMA by using Verilog.The simulation results show that the designed Verilog-based encoder and decoder of SCMA system are consistent with the theoretical analysis,and achieve the design requirements.

关 键 词：非正交多址接入技术 稀疏码多址接入 5G 码本 消息传递算法 VERILOG 

分 类 号：TN911.34[电子电信—通信与信息系统]