Design of SCMA codebook based on chaotic signal and system performance analysis

Geng ZHAO; Yanyan MA; Yingjie MA

doi:10.11959/j.issn.1000-436x.2019026

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Design of SCMA codebook based on chaotic signal and system performance analysis

Papers | 更新时间：2024-06-05

- Design of SCMA codebook based on chaotic signal and system performance analysis
- Journal on Communications Vol. 40, Issue 2, Pages: 137-144(2019)
- 作者机构：
  
  1. 西安电子科技大学通信工程学院，陕西西安 710071
  2. 北京电子科技学院网络空间安全系，北京 100070
- 作者简介：
- 基金信息：
  
  The National Natural Science Foundation of China(61772047);The National Natural Science Foundation of China(61640216)
- DOI：10.11959/j.issn.1000-436x.2019026
  CLC： TN918
- Online First：2019-02，
  
  Published：25 February 2019
- 稿件说明：
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Geng ZHAO, Yanyan MA, Yingjie MA. Design of SCMA codebook based on chaotic signal and system performance analysis[J]. Journal on Communications, 2019, 40(2): 137-144.
DOI：

Geng ZHAO, Yanyan MA, Yingjie MA. Design of SCMA codebook based on chaotic signal and system performance analysis[J]. Journal on Communications, 2019, 40(2): 137-144. DOI： 10.11959/j.issn.1000-436x.2019026.

摘要

稀疏码多址接入（SCMA）技术是新一代5G通信技术的多址技术方案之一。针对5G海量用户传输需求问题，提出了用户传输信息时采用 logistic 混沌序列代替原始系统中的随机序列来选择码本。在编码端利用基于网格编码调制（TCM）的子集分割法设计星座图，结合映射矩阵生成码本，用户信息经信道传输后在解码端通过消息传递算法（MPA）进行解码。仿真结果表明，利用混沌的伪随机序列选择码字，系统传输的误码率（BER）较低，且在高过载率情况下系统性能表现良好。

Abstract

Sparse code multiple access (SCMA) technology is one of the multiple access technology schemes for the new generation of 5G.In order to solve the transmission requirement of massive users

the logistic chaos sequence was proposed instead of the random sequence in the original system to select the codeword.The constellation method based on trellis coded modulation (TCM) subset segmentation with the mapping matrix was used to generate codebook in the encoder

and decoded through message passing algorithm (MPA) detection method.The simulation results show that the bit error rate (BER) is low when the system uses the pseudo-random sequence of chaos to select the codeword

and the system also performs well under the condition of high overload rate.

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references

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