VBR-GAM的SCMA高维度码本设计  

SCMA High-Dimensional Codebook Design Based on VBR-GAM

作　　者：邓旭 储珂 朱立东[1] DENG Xu;CHU Ke;ZHU Lidong(National Key Laboratory of Science and Technology on Communications of UESTC,Chengdu 611731,China)

机构地区：[1]电子科技大学通信抗干扰技术国家级重点实验室,四川成都611731

出　　处：《天地一体化信息网络》2023年第1期82-88,共7页Space-Integrated-Ground Information Networks

基　　金：国家自然科学基金资助项目(No.61871422)。

摘　　要：在物理层,为了解决海量用户接入问题而使用稀疏码多址接入(Sparse Code Multiple Access,SCMA)技术。现阶段有关SCMA的研究中,除了SCMA多用户检测技术的研究,还会关注SCMA系统码本设计,性能良好的SCMA码本不仅能在多用户检测过程中提升其抗噪性能,而且能够降低检测复杂度。传统的码本设计方案主要针对低维度码本进行研究,而且所设计的码本方案大部分都是基于QAM、TCM、Lattice展开的,对于高维度码本很少涉足与研究。对此主要聚焦一种新型码本设计——黄金角度调制(Golden Angle Modulation,GAM),并在此基础上提出可变比特率(Variable Bit Rate,VBR)GAM码本设计。仿真结果表明VBR-GAM码本可以灵活满足不同业务的需求,也可以通过改变调制阶数来改变不同优先级用户的功率效率,从而实现码本的变速率传输,相比传统的GAM码本性能更优,可实现更低的误码率。At the physical layer,sparse code multiple access(SCMA)technology is used to solve the problem of massive user access.In the current research on SCMA,in addition to the research on SCMA multi-user detection technology,more attention will be paid to the design of SCMA system codebooks.SCMA codebook with good performance can not only improve its anti noise performance in the process of multi-user detection,but also reduce the detection complexity.The traditional codebook design scheme is mainly researched on low-dimensional codebooks,and most of the designed codebook schemes are based on QAM,TCM,and Lattice,while few people have set foot in and studied high-dimensional codebooks.A new codebook design-Golden Angle Modulation(GAM)was mainly focused on,and on this basis,proposed a Variable Bit Rate(VBR)GAM codebook design method.The simulation results showed that the VBR-GAM codebook could fl exibly met the needs of diff erent services.With the increased of the modulation order,the VBR-GAM codebook had better performance than the traditional GAM codebook.

关 键 词：星地5G融合网络 稀疏码多址接入 码本设计 黄金角度调制 VBR-GAM码本 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]