File(s) under permanent embargo
Greedy user selection using a lattice reduction updating method for multiuser MIMO systems
journal contribution
posted on 2011-01-01, 00:00 authored by L Bai, C Chen, Jinho ChoiJinho Choi, C LingUser selection plays a crucial role in multiple-access channels (e.g., uplink channels of cellular systems) to exploit the multiuser diversity. Although the achievable rate can be adopted for a performance indicator in user selection, it may not be proper if a suboptimal detector or decoder is employed. In particular, for multiuser multiple-input-multiple-output (MIMO) systems, a low-complexity suboptimal MIMO detector can be used instead of optimal MIMO detectors, which require prohibitively high computational complexity. Under this practical circumstance, it may be desirable to derive user selection criteria based on the error probability for a given low-complexity MIMO detector. In this paper, we propose a low-complexity greedy user selection scheme with an iterative lattice reduction (LR) updating algorithm when an LR-based MIMO detector is used. We also analyze the diversity gain for combinatorial user selection approaches with various MIMO detectors. Based on the simulation results, we can confirm that the proposed greedy user selection approach can provide a comparable performance with the combinatorial approaches with much lower complexity.
History
Journal
IEEE transactions on vehicular technologyVolume
60Issue
1Pagination
136 - 147Publisher
Institute of Electrical and Electronics EngineersLocation
Piscataway, N.J.Publisher DOI
ISSN
0018-9545Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2010, IEEEUsage metrics
Categories
No categories selectedKeywords
Lattice reduction (LR)maximum likelihood (ML) detectionminimum mean square error (MMSE) detectionmultiuser multiple-input–multiple-output (MIMO) systemsuccessive interference cancellation (SIC)Science & TechnologyTechnologyEngineering, Electrical & ElectronicTelecommunicationsTransportation Science & TechnologyEngineeringTransportationmultiuser multiple-input-multiple-output (MIMO) systemRECEIVE ANTENNA SELECTIONPERFORMANCE ANALYSISCHANNELSCAPACITY
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC