Achievable Rate Performance of TDD Multi-cell Massive MIMO with Non-Orthogonal Pilots

Wenjun Fu, Pan Cao, John Thompson

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


This paper investigates the downlink throughput performance of the Grassmannian line packing (GLP)-based pilot sequence design for time-duplex-division (TDD) massive multiple-input-multiple-output (MIMO) systems. When the length of the uplink pilot sequence is less than the number of single-antenna user equipments (UEs), the GLP-based scheme may perform better than the pilot reuse scheme. With given number of UEs and pilot sequence length, the pilot design problem can be considered as the line packing problem in Grassmannian manifold. We propose a closed-form achievable rate expression for the multi-cell scenario and evaluate the throughput improvement of GLP, which is compared with the conventional pilot reuse scheme. Numerical results demonstrate the GLP-based pilot design can provide significant improvements in the system throughput over the pilot reuse scheme.
Original languageEnglish
Title of host publicationWorkshop on Smart Antennas 2016
Publication statusPublished - 9 Mar 2016
EventWorkshop on Smart Antennas 2016 - Munich, Germany
Duration: 9 Mar 201611 Mar 2016


ConferenceWorkshop on Smart Antennas 2016

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