Analysis of spatially distributed adaptive antenna array systems in cellular networks

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dc.contributor.advisor Odendaal, J.W. (Johann Wilhelm) en
dc.contributor.postgraduate Da Silveira, Marthinus Willem en
dc.date.accessioned 2013-09-06T19:54:13Z
dc.date.available 2005-06-03 en
dc.date.available 2013-09-06T19:54:13Z
dc.date.created 2004-09-24 en
dc.date.issued 2006-06-03 en
dc.date.submitted 2005-06-03 en
dc.description Thesis (PhD (Electronic Engineering))--University of Pretoria, 2006. en
dc.description.abstract The spatially distributed adaptive array is defined and analyzed. It is applied to both time division multiple access (TDMA) and code division multiple access (CDMA) cellular networks to improve the outage probability at either the base station or mobiles. In a TDMA network, the distributed array consists of three sub-arrays at alternate corners of a hexagonal cell. It is shown analytically that the SINR of combined beamforming of the distributed sub-arrays is greater than or equal to the SIR or independent beamforming of the sub-arrays. Closed form solutions are derived for estimating the BER performance of Rayleigh fading mobile signals received at a distributed adaptive array with combined beamforming of the sub-arrays. The simulated TDMA uplink outage probability of multiple same-cell co-channel users in a fading environment is compared between conventional, spatially distributed arrays with independent beamforming of the sub-arrays and combined beamforming of the sub-arrays. The effect of the antenna element spacing, number of elements and angular spread is also investigated. Spatially distributed arrays are formed in a CDMA network on the downlink with arrays in multi-way soft handoff with the mobiles. The outage probability performance of combined beamforming of the arrays in handoff is compared to independent beamforming of the arrays as well as to conventional sectorized antennas. The range between mobiles and distributed sub-arrays in the case of a spatially distribu-ted array can be larger than between conventional center cell arrays and mobiles. Therefore, the effect of interference on the range increase relative to an omni antenna of adaptive and phased arrays in a multipath environment for both narrowband and wideband spread spectrum systems is investigated. An analytical model for predicting the asymptotic range limitation of phased arrays when the angular spread exceeds the array beamwidth is derived. en
dc.description.availability unrestricted en
dc.description.department Electrical, Electronic and Computer Engineering en
dc.identifier.citation Da Silveira, MW 2004, Analysis of spatially distributed adaptive antenna array systems in cellular networks, PhD thesis, University of Pretoria, Pretoria, viewed yymmdd < http://hdl.handle.net/2263/25207 > en
dc.identifier.other H152/ag en
dc.identifier.upetdurl http://upetd.up.ac.za/thesis/available/etd-06032005-090336/ en
dc.identifier.uri http://hdl.handle.net/2263/25207
dc.language.iso en
dc.publisher University of Pretoria en_ZA
dc.rights © 2004, University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. en
dc.subject Cellular telephone systems en
dc.subject Adaptive antennas en
dc.subject Capacity increase en
dc.subject Spatially distributed adaptive antenna arrays en
dc.subject Base stations en
dc.subject UCTD en_US
dc.title Analysis of spatially distributed adaptive antenna array systems in cellular networks en
dc.type Thesis en


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