Channel Correlation Diversity in MU-MIMO Systems – Analysis and Measurements

Harsh Tataria, Seun Sangodoyin, Andreas F. Molisch, Peter J. Smith, Michail Matthaiou, Jianzhong Zhang , Reiner S. Thoma

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

1 Citation (Scopus)
63 Downloads (Pure)

Abstract

In multiuser multiple–input multiple–output (MU–MIMO) systems, channel correlation is detrimental to the system performance. We demonstrate that the widely used, yet overly simplified, correlation models that generate identical correlation profiles for each terminal tend to severely underestimate the system performance. In sharp contrast, more physically motivated models that capture variations in the power angular spectra across multiple terminals, generate diverse correlation patterns. This has a significant impact on the system performance. Assuming correlated Rayleigh fading and downlink zero–forcing precoding, tight closed–form approximations corroborated to the average signal–to–noise–ratio, and ergodic sum spectral efficiency are derived. Our expressions provide clear insights into the impact of diverse correlation patterns on the above performance metrics. Unlike previous works, the correlation models are parameterized with measured data from a recent 2.53 GHz urban
macrocellular campaign in Cologne, Germany. Overall, results from this paper can be treated as a timely re–calibration of performance expectations from practical MU–MIMO systems.
Original languageEnglish
Title of host publication 2019 IEEE 30th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)
Publisher IEEE
Number of pages7
ISBN (Electronic)978-1-5386-8110-7
ISBN (Print)978-1-5386-8111-4
DOIs
Publication statusPublished - 21 Nov 2019
Event30th IEEE Annual International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2019 - Istanbul, Turkey
Duration: 08 Sep 201911 Sep 2019

Publication series

Name IEEE Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC): Proceedings
ISSN (Print)2166-9570
ISSN (Electronic)2166-9589

Conference

Conference30th IEEE Annual International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2019
Country/TerritoryTurkey
CityIstanbul
Period08/09/201911/09/2019

Keywords

  • Channel correlation
  • Ergodic sum spectral efficiency
  • Power angular spectra
  • Propagation measurements
  • Zero-forcing precoding

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