Capacity Optimizing Power Loading Scheme for Spatially Constrained Antenna Arrays: Channels with Narrow Angular Spread

dc.contributor.authorLamahewa, Tharaka
dc.contributor.authorPollock, Tony
dc.contributor.authorAbhayapala, Thushara
dc.coverage.spatialChristchurch New Zealand
dc.date.accessioned2015-12-07T22:14:48Z
dc.date.createdJanuary 30-February 1 2008
dc.date.issued2008
dc.date.updated2016-02-24T10:21:49Z
dc.description.abstractThis paper proposes a capacity optimizing power loading scheme for spatially constrained antenna arrays. The proposed power loading scheme is designed mainly for MIMO systems that are operating over channels with narrow angular spread values. The design problem is approached from a physical wave field perspective, in particular using a modal expansion for free space wave propagation. When a signal is transmitted from a spatially constrained antenna array, there will be an infinite number of modes excited at the transmit antenna region and only a finite number of those excited modes will have sufficient power to carry information to the other end of the channel. We show that in a non-isotropic scattering environment, correlation between adjacent modes is significantly higher than the correlation between well separated mode orders. Based on this finding, the power loading scheme is designed to eliminate the correlation between adjacent modes by allocating zero power to every second effective mode at the transmitter region. The capacity performance of the proposed scheme is evaluated for 1-D and 2-D antenna array geometries and results are compared with the traditional equal power loading scheme. We show that the proposed scheme gives more scope for capacity improvements for 1-D arrays at low angular spread values than for 2-D arrays.
dc.identifier.isbn9781424420384
dc.identifier.urihttp://hdl.handle.net/1885/17604
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE Inc)
dc.relation.ispartofseriesAustralian Communications Theory Workshop (AusCTW 2008)
dc.sourceProceedings of the Australian Communications Theory Workshop (AusCTW 2008)
dc.subjectKeywords: 2D-arrays; Angular spreads; Array geometries; Capacity improvement; Capacity performance; Design problems; Excited mode; Finite number; Free space; Infinite numbers; Isotropic scattering; Modal expansion; Mode order; Power loading; Transmit antenna; Wavef
dc.titleCapacity Optimizing Power Loading Scheme for Spatially Constrained Antenna Arrays: Channels with Narrow Angular Spread
dc.typeConference paper
local.bibliographicCitation.lastpage22
local.bibliographicCitation.startpage17
local.contributor.affiliationLamahewa, Tharaka, College of Engineering and Computer Science, ANU
local.contributor.affiliationAbhayapala, Thushara, College of Engineering and Computer Science, ANU
local.contributor.affiliationPollock, Tony, National ICT Australia
local.contributor.authoremailu3995913@anu.edu.au
local.contributor.authoruidLamahewa, Tharaka, u3995913
local.contributor.authoruidAbhayapala, Thushara, u9701943
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.absfor100510 - Wireless Communications
local.identifier.absfor080401 - Coding and Information Theory
local.identifier.ariespublicationu3995913xPUB2
local.identifier.doi10.1109/AUSCTW.2008.4460815
local.identifier.scopusID2-s2.0-77956370681
local.identifier.thomsonID000256382900004
local.identifier.uidSubmittedByu3995913
local.type.statusPublished Version

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