电信科学 ›› 2017, Vol. 33 ›› Issue (8): 138-144.doi: 10.11959/j.issn.1000-0801.2017188

• 研究与开发 • 上一篇    下一篇

一种新型上行SCMA系统接收机

张宏扬,郑长亮,邵根富,刘华平   

  1. 杭州电子科技大学,浙江 杭州 310018
  • 修回日期:2017-06-06 出版日期:2017-08-01 发布日期:2017-08-25
  • 作者简介:张宏扬(1991-),男,杭州电子科技大学硕士生,主要研究方向为非正交多址接入。|郑长亮(1980-),男,博士,杭州电子科技大学讲师,主要研究方向为无线通信、移动通信等。|邵根富(1962-),男,杭州电子科技大学教授、硕士生导师,主要研究方向为无线通信理论、信号处理与自动控制等。|刘华平(1965-),男,博士,杭州电子科技大学特聘教授、硕士生导师,美国俄勒冈州立大学终身教授,主要研究方向为无线通信理论、无线传感网络和信号处理等。
  • 基金资助:
    国家自然科学基金资助项目(61471153);杭州电子科技大学科研启动基金资助项目(KYS085614014);杭州电子科技大学科研启动基金资助项目(ZX150204307002/001)

A novel receiver for uplink SCMA system

Hongyang ZHANG,Changliang ZHENG,Genfu SHAO,Huaping LIU   

  1. Hangzhou Dianzi University,Hangzhou 310018,China
  • Revised:2017-06-06 Online:2017-08-01 Published:2017-08-25
  • Supported by:
    The National Natural Science Foundation of China(61471153);Scientific Research Foundation of Hangzhou Dianzi University(KYS085614014);Scientific Research Foundation of Hangzhou Dianzi University(ZX150204307002/001)

摘要:

稀疏码多址接入(SCMA)是一种码域非正交多址接入技术,以其优异性能成为5G多址接入技术的热门候选方案。上行SCMA系统一般采用消息传递算法(MPA)接收机,检测过程中存在由先验信息带来的误差。针对这一问题提出一种新型接收机,称为环MPA(R-MPA)接收机,其通过一种联合检测方案来消除上述误差对最终检测结果的影响。理论分析和仿真验证表明,与现有的log-MPA接收机及经典MPA接收机相比,所提R-MPA接收机是一种检测精度更高而实施复杂度较低的上行SCMA系统接收机。

关键词: 5G, 稀疏码多址接入, 消息传递算法, 环MPA, 过载率

Abstract:

Sparse code multiple access (SCMA) is a type of code domain non-orthogonal multiple access technology,which is regarded as a promising multiple access technology for 5G due to its excellent performance.The uplink SCMA system generally uses a message passing algorithm (MPA) in the receiver.The priori information can be inaccurated to cause an increased detection error.A novel receiver for the uplink SCMA system,called ring-MPA (R-MPA) receiver,was proposed to solve this problem,by using a joint detection process.The proposed R-MPA receiver was compared with the log-MPA receiver and the classic MPA receiver,two state-of-the-art existing schemes.Both theoretical analysis and computer simulation results show that the proposed receiver not only has a superior error performance,but also has a lower implementation complexity than these existing schemes.

Key words: 5G, sparse code multiple access, message passing algorithm, R-MPA, overloading factor

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