基于混沌序列的SCMA码本设计及系统性能分析

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

通信学报 ›› 2019, Vol. 40 ›› Issue (2): 137-144.doi: 10.11959/j.issn.1000-436x.2019026

基于混沌序列的SCMA码本设计及系统性能分析

赵耿^1,²,马艳艳^1,²,马英杰²

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

修回日期:2018-06-14 出版日期:2019-02-01 发布日期:2019-03-04
作者简介:赵耿（1964- ），男，四川苍溪人，博士，北京电子科技学院教授，主要研究方向为混沌保密通信、信息安全。|马艳艳（1994- ），女，河南洛阳人，西安电子科技大学硕士生，主要研究方向为5G、混沌保密通信。|马英杰（1979- ），女，吉林通化人，北京电子科技学院副教授，主要研究方向为通信系统、混沌保密通信。
基金资助:
国家自然科学基金资助项目(61772047);国家自然科学基金资助项目(61640216)

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

Geng ZHAO^1,²,Yanyan MA^1,²,Yingjie MA²

¹ School of Telecommunication Engineering,Xidian University,Xi’an 710071,China
² Department of Cyber Space Security,Beijing Electronic Science and Technology Institute,Beijing 100070,China

Revised:2018-06-14 Online:2019-02-01 Published:2019-03-04
Supported by:
The National Natural Science Foundation of China(61772047);The National Natural Science Foundation of China(61640216)

摘要/Abstract

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。

关键词: 稀疏码多址接入, logistic混沌序列, 码本设计, 基于网格编码调制的子集分割法

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.

Key words: SCMA, logistic chaotic sequence, codebook design, TCM subset segmentation

中图分类号:

TN918

赵耿,马艳艳,马英杰. 基于混沌序列的SCMA码本设计及系统性能分析[J]. 通信学报, 2019, 40(2): 137-144.

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.

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基于混沌序列的SCMA码本设计及系统性能分析

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

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