SCMA High-Dimensional Codebook Design Based on VBR-GAM

Xu DENG; Ke CHU; Lidong ZHU

doi:10.11959/j.issn.2096-8930.2023010

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SCMA High-Dimensional Codebook Design Based on VBR-GAM

Studies | 更新时间：2024-06-03

- SCMA High-Dimensional Codebook Design Based on VBR-GAM
- Space-Integrated-Ground Information Networks Vol. 4, Issue 1, Pages: 82-88(2023)
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- DOI：10.11959/j.issn.2096-8930.2023010
  CLC： TP393
- Published Online：2023-03，
  
  Published：20 March 2023
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Xu DENG, Ke CHU, Lidong ZHU. SCMA High-Dimensional Codebook Design Based on VBR-GAM[J]. Space-integrated-ground information networks, 2023, 4(1): 82-88.
DOI：

Xu DENG, Ke CHU, Lidong ZHU. SCMA High-Dimensional Codebook Design Based on VBR-GAM[J]. Space-integrated-ground information networks, 2023, 4(1): 82-88. DOI： 10.11959/j.issn.2096-8930.2023010.

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。

Abstract

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.

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references

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