A novel receiver for uplink SCMA system

Hongyang ZHANG; Changliang ZHENG; Genfu SHAO; Huaping LIU

doi:10.11959/j.issn.1000-0801.2017188

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A novel receiver for uplink SCMA system

research and development | 更新时间：2024-06-05

- A novel receiver for uplink SCMA system
- Telecommunications Science Vol. 33, Issue 8, Pages: 138-144(2017)
- 作者机构：
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- DOI：10.11959/j.issn.1000-0801.2017188
  CLC： TN929.5
- Published Online：2017-08，
  
  Published：15 August 2017
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Hongyang ZHANG, Changliang ZHENG, Genfu SHAO, et al. A novel receiver for uplink SCMA system[J]. Telecommunications science, 2017, 33(8): 138-144.
DOI：

Hongyang ZHANG, Changliang ZHENG, Genfu SHAO, et al. A novel receiver for uplink SCMA system[J]. Telecommunications science, 2017, 33(8): 138-144. DOI： 10.11959/j.issn.1000-0801.2017188.

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。

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.

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references

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