Uncoordinated and Decentralized Processing in Extra-Large MIMO Arrays

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Abstract

We propose a decentralized receiver for extra-large multiple-input multiple-output (XL-MIMO) arrays. Our method operates with no central processing unit (CPU) and all the signal detection tasks are done in distributed nodes. We exploit a combined message-passing framework to design an uncoordinated detection scheme that overcomes three major challenges in the XL-MIMO systems: computational complexity, scalability and non-stationarities in user energy distribution. Our numerical evaluations show a significant performance improvement compared to benchmark distributed methods while operating very close to the centralized receivers.

Original languageEnglish
JournalI E E E Wireless Communications Letters
Volume11
Issue number1
Pages (from-to)81-85
Number of pages5
ISSN2162-2337
DOIs
Publication statusPublished - 1 Jan 2022

Keywords

  • Array signal processing
  • Central Processing Unit
  • MIMO communication
  • Massive MIMO
  • Message-passing
  • Probability density function
  • Random variables
  • Receivers
  • Scalability
  • XL-MIMO.
  • decentralized receivers

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