Survey Propagation for Cell-Free Massive MIMO Pilot Assignment

Sunho Kim, Hong Ki Kim, Sang Hyun Lee

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


This work develops a survey propagation approach to distributed pilot assignment (PA) optimization in cell-free massive multiple-input multiple-output networks. The reuse of pilot signals among multiple links incurs the pilot contamination, thereby degrading the system performance. For sustainable management of pilot sequences, the PA operation policy can be formulated in a combinatorial way. To avoid large-scale computational loads, the resulting optimization task is approached in a novel distributed framework of survey propagation, which has been originally developed to address interacting particle systems in physics. A developed algorithm demonstrates outperforming behaviors over existing schemes with respect to the overall network throughput.

Original languageEnglish
Title of host publication2022 IEEE GLOBECOM Workshops, GC Wkshps 2022 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
ISBN (Electronic)9781665459754
Publication statusPublished - 2022
Event2022 IEEE GLOBECOM Workshops, GC Wkshps 2022 - Virtual, Online, Brazil
Duration: 2022 Dec 42022 Dec 8

Publication series

Name2022 IEEE GLOBECOM Workshops, GC Wkshps 2022 - Proceedings


Conference2022 IEEE GLOBECOM Workshops, GC Wkshps 2022
CityVirtual, Online

Bibliographical note

Funding Information:
ACKNOWLEDGMENT This work is supported in part by the NRF grant funded by the Korea government Ministry of Science and ICT (MSIT) under Grant 2019R1A2C1084855 and in part by Institute of Information & communications Technology Planning & Evaluation (IITP) grant funded by the MSIT (No. 2021-0-00467, Intelligent 6G Wireless Access System).

Publisher Copyright:
© 2022 IEEE.

ASJC Scopus subject areas

  • Instrumentation
  • Computer Networks and Communications
  • Control and Optimization


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