Eisenstein Integer Optimized SCMA Codebook Design Method

doi:10.12382/bgxb.2022.0021

Abstract

Abstract:

The emergence of 5th generation mobile networks (5G) has provided unprecedented data transmission rates and support for massive data connections. However, traditional orthogonal access technologies cannot guarantee efficient resource utilization. As a type of Non-Orthogonal Multiple Access, Sparse Code Multiple Access (SCMA) technology ensures the reliable transmission of massive user information through effective allocation of resource blocks. The design of the codebook plays a vital role in the efficacy of SCMA technology. In response to limited error rate reduction in traditional codebook design methods, this paper proposes the Eisenstein Integer Optimization (EIO) method. This method constructs the mother constellation on the resource block using Eisenstein Integer (EI) and incorporates the concept of subset segmentation of trellis coded modulation (TCM). Simulation results indicate that, under identical conditions, EIO codebooks offer a lower bit error rate than Huawei codebooks, traditional Eisenstein codebooks, and TCM codebooks. This study provides a feasible codebook design method for SCMA technology.

Key words: 5G technology, non-orthogonal multiple access, sparse code multiple access, Eisenstein integer, codebook

LIU Fang, LIU Jian, FENG Yongxin. Eisenstein Integer Optimized SCMA Codebook Design Method[J]. Acta Armamentarii, 2023, 44(5): 1529-1536.

Figures/Tables 9

Fig.1 SCMA coding mechanism

Fig.2 Mother constellation on resource blocks

Fig.3 Subset constellations generated by TCM segmentation

Fig.4 Constellation matrix of user and resource blocks

Fig.5 Comparison of different codebooks using MPA

Fig.6 Comparison of different codebooks using DS-MPA

Fig.7 Comparison of different codebooks using PM-MPA

Fig.8 Comparison of different codebooks using SD-MPA (Δ=δ)

Fig.9 Comparison of different codebooks using SD-MPA (Δ=2δ)

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