Multiuser Correlation and Sum-Rate in Outdoor Measured Massive MIMO Channels

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Abstract

This letter analyzes the impact of interuser distance and angular separation on the channel correlation and achievable sum-rate for a massive multiple-input-multiple-output (MIMO) system in non-line-of-sight (NLOS) conditions. The investigation is based on outdoor measurements on a channel sounding system capturing the dynamic channel of two user arrays. The letter analyzes correlation and sum-rate with varying interuser distance and angular separation of dominant beams toward the users. A large span of correlation and sum-rate values are found across the range of distances and angular separation. The investigation shows a moderate link between interuser distance and correlation, but a strong impact on correlation is found only for low angular separation of the users. The results of this NLOS scenario suggest that a distance-based criteria alone is not sufficient to accurately model shared clusters and their correlation.

Original languageEnglish
Article number8970373
JournalI E E E Antennas and Wireless Propagation Letters
Volume19
Issue number3
Pages (from-to)433-437
Number of pages5
ISSN1536-1225
DOIs
Publication statusPublished - Mar 2020

Keywords

  • Massive multiple-input-multiple-output (MIMO)
  • Measured channels
  • Multiuser consistency
  • Sum-rate

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