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
王甜,熊兴中
摘要(Abstract)：
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。
关键词(KeyWords)： 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
基金项目(Foundation): 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)~~
作者(Author): 王甜,熊兴中
DOI: 10.16652/j.issn.1004-373x.2018.23.004
参考文献(References)：
- [1]DAI Linglong,WANG Bichai,YUAN Yifei,et al.Non-orthogonal multiple access for 5G:solutions,challenges,opportunities,and future research trends[J].IEEE communications magazine,2015,53(9):74-81.
- [2]SONI H B,DESAI U B,MERCHANT S N.Performance analysis of multiuser DS-UWB system with orthogonal and nonorthogonal code under synchronous and a synchronous transmission[C]//2008 Wireless and Mobile Communications Conference.[S.l.]:IEEE,2008:247-252.
- [3]HOSHYAR R,RAZAVI R,AL-IMARI M.LDS-OFDM an efficient multiple access technique[C]//2010 IEEE Vehicular Technology Conference.Taipei,China:IEEE,2010:1-5.
- [4]BEEK J V D,POPOVIC B M.Multiple access with low-density signatures[C]//2009 IEEE Global Telecommunication Conference.Honolulu:IEEE,2009:1-6.
- [5]NIKOPOUR H,BALIGH H.Sparse code multiple access[C]//2013 IEEE the 24th Annual International Symposium on Personal,Indoor,and Mobile Radio Communications.London:IEEE,2013:332-336.
- [6]BAYESTEH A,YI E,NIKOPOUR H,et al.Blind detection of SCMA for uplink grant-free multiple-access[C]//Proceedings of 2014 International Symposium on Wireless Communications Systems.Barcelona:IEEE,2014:853-857.
- [7]毕奇,梁林,杨姗,等.面向5G的非正交多址接入技术[J].电信科学,2015,31(5):14-21.BI Qi,LIANG Lin,YANG Shan,et al.Non-orthogonal multiple access technology for 5G[J].Telecommunication science,2015,31(5):14-21.
- [8]HOSHYAR R,WATHAN F P,TAFAZOLLI R.Novel low-density signature for synchronous CDMA systems over AWGNchannel[J].IEEE transactions on signal processing,2008,56(4):1616-1626.
- [9]RAZAVI R,AL-IMARI M,IMRAN M A,et al.On receiver design for uplink low density signature OFDM(LDS-OFDM)[J].IEEE transactions on communications,2012,60(11):3499-3508.
- [10]MU H,MA Z,ALHAJI M,et al.A fixed low complexity message pass algorithm detector for up-link SCMA system[J].IEEE wireless communication letters,2015,4(6):585-588.
- [11]MARCUS M J.5G and"IMT for 2020 and beyond":spectrum policy and regulatory issues[J].IEEE wireless communications,2015,22(4):2-3.
- [12]TAHERZADEH M,NIKOPOUR H,BAYESTEH A,et al.SCMA codebook design[C]//Proceedings of 2014 IEEE the80th Vehicular Technology Conference.Vancouver:IEEE,2014:1-5.
- [13]Innovate.SCMA:massive connectivity&low latency[EB/OL].[2016-06-15].http://www.innovateasia.com/5g/gp2.Html.
- [14]ZHANG Shunqing,XU X,LU L,et al.Sparse code multiple access:an energy efficient uplink approach for 5G wireless systems[C]//Proceedings of 2014 GLOBECOM.[S.l.]:IEEE,2014:4782-4787.
- [15]宋春雪,文萍,张学晨.基于5G无线通信的稀疏码多址接入系统的FPGA实现[J].电子技术应用,2016,42(7):8-12.SONG Chunxue,WEN Ping,ZHANG Xuechen.FPGA implementation of sparse code multiple access system based on 5Gwireless communication[J].Application of electronic technology,2016,42(7):8-12.