The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
O acesso múltiplo por divisão de código esparso (SCMA) é uma tecnologia de acesso múltiplo não ortogonal (NOMA) que pode melhorar a utilização da banda de frequência e permitir que muitos usuários compartilhem alguns elementos de recursos (REs). Este artigo utiliza a teoria da modulação da rede para desenvolver um procedimento de construção sistemático para o projeto de livros de códigos SCMA sob ambientes de canais gaussianos que podem alcançar projetos quase ótimos, especialmente para casos que consideram parâmetros SCMA de grande escala. Porém, sob a condição de parâmetros SCMA de grande escala, os pontos da constelação mãe (MC) se sobreporão, o que pode ser resolvido pelo método da transformação de dimensões parciais (PDT). Mais importante ainda, consideramos a probabilidade de erro limitada superior da transmissão do sinal nos canais AWGN e projetamos um método de alocação de palavras de código para reduzir a interferência entre símbolos (ISI) no mesmo RE. Os resultados da simulação mostram que sob diferentes tamanhos de livros de código e diferentes taxas de sobrecarga, usando dois algoritmos de passagem de mensagens (MPA) diferentes para verificar, o livro de códigos proposto neste artigo tem uma taxa de erro de bit (BER) significativamente melhor que os livros de códigos de referência, além do tempo de convergência não excede o dos livros de códigos de referência.
Shiqing QIAN
Xinjiang University
Wenping GE
Xinjiang University
Yongxing ZHANG
Xinjiang University
Pengju ZHANG
Xinjiang University
The copyright of the original papers published on this site belongs to IEICE. Unauthorized use of the original or translated papers is prohibited. See IEICE Provisions on Copyright for details.
Copiar
Shiqing QIAN, Wenping GE, Yongxing ZHANG, Pengju ZHANG, "A Large-Scale SCMA Codebook Optimization and Codeword Allocation Method" in IEICE TRANSACTIONS on Communications,
vol. E105-B, no. 7, pp. 788-796, July 2022, doi: 10.1587/transcom.2021EBP3156.
Abstract: Sparse code division multiple access (SCMA) is a non-orthogonal multiple access (NOMA) technology that can improve frequency band utilization and allow many users to share quite a few resource elements (REs). This paper uses the modulation of lattice theory to develop a systematic construction procedure for the design of SCMA codebooks under Gaussian channel environments that can achieve near-optimal designs, especially for cases that consider large-scale SCMA parameters. However, under the condition of large-scale SCMA parameters, the mother constellation (MC) points will overlap, which can be solved by the method of the partial dimensions transformation (PDT). More importantly, we consider the upper bounded error probability of the signal transmission in the AWGN channels, and design a codeword allocation method to reduce the inter symbol interference (ISI) on the same RE. Simulation results show that under different codebook sizes and different overload rates, using two different message passing algorithms (MPA) to verify, the codebook proposed in this paper has a bit error rate (BER) significantly better than the reference codebooks, moreover the convergence time does not exceed that of the reference codebooks.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2021EBP3156/_p
Copiar
@ARTICLE{e105-b_7_788,
author={Shiqing QIAN, Wenping GE, Yongxing ZHANG, Pengju ZHANG, },
journal={IEICE TRANSACTIONS on Communications},
title={A Large-Scale SCMA Codebook Optimization and Codeword Allocation Method},
year={2022},
volume={E105-B},
number={7},
pages={788-796},
abstract={Sparse code division multiple access (SCMA) is a non-orthogonal multiple access (NOMA) technology that can improve frequency band utilization and allow many users to share quite a few resource elements (REs). This paper uses the modulation of lattice theory to develop a systematic construction procedure for the design of SCMA codebooks under Gaussian channel environments that can achieve near-optimal designs, especially for cases that consider large-scale SCMA parameters. However, under the condition of large-scale SCMA parameters, the mother constellation (MC) points will overlap, which can be solved by the method of the partial dimensions transformation (PDT). More importantly, we consider the upper bounded error probability of the signal transmission in the AWGN channels, and design a codeword allocation method to reduce the inter symbol interference (ISI) on the same RE. Simulation results show that under different codebook sizes and different overload rates, using two different message passing algorithms (MPA) to verify, the codebook proposed in this paper has a bit error rate (BER) significantly better than the reference codebooks, moreover the convergence time does not exceed that of the reference codebooks.},
keywords={},
doi={10.1587/transcom.2021EBP3156},
ISSN={1745-1345},
month={July},}
Copiar
TY - JOUR
TI - A Large-Scale SCMA Codebook Optimization and Codeword Allocation Method
T2 - IEICE TRANSACTIONS on Communications
SP - 788
EP - 796
AU - Shiqing QIAN
AU - Wenping GE
AU - Yongxing ZHANG
AU - Pengju ZHANG
PY - 2022
DO - 10.1587/transcom.2021EBP3156
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E105-B
IS - 7
JA - IEICE TRANSACTIONS on Communications
Y1 - July 2022
AB - Sparse code division multiple access (SCMA) is a non-orthogonal multiple access (NOMA) technology that can improve frequency band utilization and allow many users to share quite a few resource elements (REs). This paper uses the modulation of lattice theory to develop a systematic construction procedure for the design of SCMA codebooks under Gaussian channel environments that can achieve near-optimal designs, especially for cases that consider large-scale SCMA parameters. However, under the condition of large-scale SCMA parameters, the mother constellation (MC) points will overlap, which can be solved by the method of the partial dimensions transformation (PDT). More importantly, we consider the upper bounded error probability of the signal transmission in the AWGN channels, and design a codeword allocation method to reduce the inter symbol interference (ISI) on the same RE. Simulation results show that under different codebook sizes and different overload rates, using two different message passing algorithms (MPA) to verify, the codebook proposed in this paper has a bit error rate (BER) significantly better than the reference codebooks, moreover the convergence time does not exceed that of the reference codebooks.
ER -