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Joint Pilot Sequence Design and Power Control for Max-Min Fairness in Uplink Massive MIMO
Linköping University, Department of Electrical Engineering, Communication Systems. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Electrical Engineering, Communication Systems. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Electrical Engineering, Communication Systems. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-7599-4367
2017 (English)In: IEEE International Conference on Communications (ICC), 2017, Institute of Electrical and Electronics Engineers (IEEE), 2017Conference paper, Published paper (Refereed)
Abstract [en]

This paper optimizes the pilot assignment and pilottransmit powers to mitigate pilot contamination in MassiveMIMO (multiple-input multiple-output) systems. While priorworks have treated pilot assignment as a combinatorial problem,we achieve a more tractable problem formulation by directlyoptimizing the pilot sequences. To this end, we compute alower bound on the uplink (UL) spectral efficiency (SE), forRayleigh fading channels with maximum ratio (MR) detectionand arbitrary pilot sequences. We optimize the max-min SEwith respect to the pilot sequences and pilot powers, under powerbudget constraints. This becomes an NP-hard signomial problem,but we propose an efficient algorithm to obtain a local optimumwith polynomial complexity. Numerical results manifest the nearoptimality of the proposed algorithm and show significant gainsover existing suboptimal algorithms.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2017.
Series
IEEE International Conference on Communications, E-ISSN 1938-1883
National Category
Communication Systems
Identifiers
URN: urn:nbn:se:liu:diva-139595DOI: 10.1109/ICC.2017.7996780ISBN: 978-1-4673-8999-0 (electronic)ISBN: 978-1-4673-9000-2 (print)OAI: oai:DiVA.org:liu-139595DiVA: diva2:1130354
Conference
IEEE International Conference on Communications, Paris, France, 21-25 May 2017
Projects
ELLIITCENIIT5Gwireless
Funder
ELLIIT - The Linköping‐Lund Initiative on IT and Mobile CommunicationsEU, Horizon 2020
Available from: 2017-08-09 Created: 2017-08-09 Last updated: 2017-08-09Bibliographically approved

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fulltext(364 kB)20 downloads
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CiteExportLink to record
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