When pilots should not be reused across interfering cells in massive MIMO

Ji Yong Sohn, Sung Whan Yoon, Jaekyun Moon

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

6 Citations (Scopus)

Abstract

The pilot reuse issue in massive multi-input multi-output (MIMO) antenna systems with interfering cells is closely examined. This paper considers scenarios where the ratio of the channel coherence time to the number of users in a cell may be sufficiently large. One such practical scenario arises when the number of users per unit coverage area cannot grow freely while user mobility is low, as in indoor networks. Another important scenario is when the service provider is interested in maximizing the sum rate over a fixed, selected number of users rather than the sum rate over all users in the cell. A sum-rate comparison analysis shows that in such scenarios less aggressive reuse of pilots involving allocation of additional pilots for interfering users yields significant performance advantage relative to the case where all cells reuse the same pilot set. For a given ratio of the normalized coherence time interval to the number of users per cell, the optimal pilot assignment strategy is revealed via a closed-form solution and the resulting net sum-rate is compared with that of the full pilot reuse.

Original languageEnglish
Title of host publication2015 IEEE International Conference on Communication Workshop, ICCW 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1257-1263
Number of pages7
ISBN (Electronic)9781467363051
DOIs
Publication statusPublished - 2015 Sept 8
EventIEEE International Conference on Communication Workshop, ICCW 2015 - London, United Kingdom
Duration: 2015 Jun 82015 Jun 12

Publication series

Name2015 IEEE International Conference on Communication Workshop, ICCW 2015

Conference

ConferenceIEEE International Conference on Communication Workshop, ICCW 2015
Country/TerritoryUnited Kingdom
CityLondon
Period15/6/815/6/12

Bibliographical note

Publisher Copyright:
© 2015 IEEE.

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications

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