Increasing capacity in massive MIMO cellular networks via small cells

Abbas Kazerouni, F. Javier Lopez-Martinez, Andrea Goldsmith

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

10 Scopus citations


We consider the impact on pilot contamination of reducing cell size in massive MIMO cellular networks. In the limit of a large number of antennas, pilot contamination dictates the capacity limit of such networks. In this work, we examine how capacity of massive MIMO cellular networks changes as a function of cell size. In particular, we introduce the concept of copilot distance and formulate the worst-case capacity of a typical user in the network as a function of this distance. This formulation captures the effect upon capacity of all system parameters such as cell radius, user density and the fraction of time devoted to channel estimation. Based on this formulation, we show how cell size reduction mitigates the pilot contamination and hence increases the capacity of each user as well as the number of supported users. We also provide numerical and simulation results to confirm our analysis.

Original languageEnglish (US)
Title of host publication2014 IEEE Globecom Workshops, GC Wkshps 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
ISBN (Electronic)9781479974702
StatePublished - Mar 18 2014
Externally publishedYes
Event2014 IEEE Globecom Workshops, GC Wkshps 2014 - Austin, United States
Duration: Dec 8 2014Dec 12 2014

Publication series

Name2014 IEEE Globecom Workshops, GC Wkshps 2014


Conference2014 IEEE Globecom Workshops, GC Wkshps 2014
Country/TerritoryUnited States

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Communication


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