Distributed MIMO Uplink Capacity under Transform Coding Fronthaul Compression

Fred Wiffen, Mohammud Z. Bocus, Angela Doufexi, Andrew Nix

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

1 Citation (Scopus)

Abstract

In this work we analyse the capacity of the distributed MIMO uplink when transform coding is applied locally at each remote radio head (RRH) to compress fronthaul traffic. Assuming the use of optimal scalar compression, we derive a closed form capacity expression for the distributed MIMO uplink under Gaussian signalling, which is shown to be a function of both local and global channel eigendecompositions. We then outline two rate allocation schemes for efficiently allocating the available fronthaul to the compressed scalars, based on either local or global channel state information (CSI). Numerical results under Rayleigh fading conditions are presented which show that transform coding can provide a significant compression gain relative to direct signal quantisation, which grows as the number of antennas deployed at each RRH increases. Results also show that allocating fronthaul based on global CSI significantly improves performance, especially as the number of RRHs deployed increases.

Original languageEnglish
Title of host publication2019 IEEE International Conference on Communications, ICC 2019 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages6
ISBN (Electronic)9781538680889
DOIs
Publication statusPublished - 1 May 2019
Event2019 IEEE International Conference on Communications, ICC 2019 - Shanghai, China
Duration: 20 May 201924 May 2019

Publication series

NameIEEE International Conference on Communications
Volume2019-May
ISSN (Print)1550-3607

Conference

Conference2019 IEEE International Conference on Communications, ICC 2019
CountryChina
CityShanghai
Period20/05/1924/05/19

Keywords

  • C-RAN
  • cell-free
  • distributed MIMO
  • fronthaul compression
  • transform coding

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  • Cite this

    Wiffen, F., Bocus, M. Z., Doufexi, A., & Nix, A. (2019). Distributed MIMO Uplink Capacity under Transform Coding Fronthaul Compression. In 2019 IEEE International Conference on Communications, ICC 2019 - Proceedings [8762078] (IEEE International Conference on Communications; Vol. 2019-May). Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.1109/ICC.2019.8762078