Adaptive Resource Allocation Based on Factor Graphs in Non-Orthogonal Multiple Access

Taichi Yamagami, Satoshi Denno, Yafei Hou

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, we propose a non-orthogonal multiple access with adaptive resource allocation based on factor graphs. The proposed non-orthogonal multiple access assigns multiple frequency resources for each device to send their packet. Even if the number of the devices is more than the frequency resources, the proposed non-orthogonal access allows all the devices to transmit their packets simultaneously for high capacity massive machine type communication (mMTC). Furthermore, this paper proposes adaptive resource allocation based on factor graphs that adaptively allocates the frequency resources to the devices for improvement of the transmission performances. This paper proposes two allocation criteria for the proposed adaptive allocation. This paper shows that the proposed non-orthogonal multiple access achieves superior transmission performance in 4path Rayleigh fading channel with overloading ratio of 1.5, even without the adaptive resource allocation. The adaptive resource allocation enables the proposed non-orthogonal access to attain a gain of about 5 dB at the BER of 10-4.

Original languageEnglish
Title of host publicationWPMC 2021 - 24th International Symposium on Wireless Personal Multimedia Communications
Subtitle of host publicationPaving the Way for Digital and Wireless Transformation
PublisherIEEE Computer Society
ISBN (Electronic)9781665427609
DOIs
Publication statusPublished - 2021
Event24th International Symposium on Wireless Personal Multimedia Communications, WPMC 2021 - Okayama, Japan
Duration: Dec 14 2021Dec 16 2021

Publication series

NameInternational Symposium on Wireless Personal Multimedia Communications, WPMC
Volume2021-December
ISSN (Print)1347-6890

Conference

Conference24th International Symposium on Wireless Personal Multimedia Communications, WPMC 2021
Country/TerritoryJapan
CityOkayama
Period12/14/2112/16/21

Keywords

  • Factor Graphs
  • Log-Likelihood Ratio
  • Message Passing Algorithm
  • Non-Orthogonal Multiple Access

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Computer Science Applications
  • Human-Computer Interaction

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