Adaptive modulation and adaptive antenna assisted wireless TDMA/CDMA networks
Adaptive modulation and adaptive antenna assisted wireless TDMA/CDMA networks
The performance of a Frequency Division Multiple Access (FDMA)/Time Division Multiple Access (TDMA) based cellular mobile network invoking the 7-cell Fixed Channel Allocation (FCA) algorithm and a Dynamic Channel Allocation (DCA) algorithm - the Locally Optimised Least Interference Algorithm (LOLIA) - in conjunction with frequency re-use exclusion zones of both 7 and 19 adjacent cells was investigated. Single element antennas, as well as two- and four-element adaptive antenna arrays located at the base stations were used and the system's performance was evaluated in a Line-Of-Sight (LOS) propagation environment. This work was then extended by investigating the network capacity, when subjected to a three-ray multipath channel, both with and without Power Control (PC). Furthermore, the potential network capacity gains achieved by Adaptive Quadrature Amplitude Modulation (AQAM) technique integrated with PC were also considered. Additionally, the effects of two different interference environments, namely the "desert-island" and the "wrap-around" scenarios on network capacity were studied.
Similarly, the network capacity of a Code Division Multiple Access (CDMA) based, Universal Mobile Telecommunication System (UMTS) Terrestrial Radio Access (UTRA)-like cellular mobile network was then investigated. The relative performance of four different soft handover algorithms was compared in terms of the network capacity, size of the Active Base station Set (ABS) and the mean transmission powers, for both non-shadowed and log-normal shadow faded propagation environments. The capacity gains achieved with the advent of two- and four-element adaptive antenna arrays were then investigated, under both non-shadowed and shadow-faded conditions. Further results were presented, whilst performing independent up- and down-link beamforming. Finally, the performance benefits of AQAM both with and without beamforming, in conjunction with shadow fading were determined.
University of Southampton
Blogh, Jonathan S
2cb10b0d-e48d-4772-b81a-cc200e18683f
2001
Blogh, Jonathan S
2cb10b0d-e48d-4772-b81a-cc200e18683f
Blogh, Jonathan S
(2001)
Adaptive modulation and adaptive antenna assisted wireless TDMA/CDMA networks.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
The performance of a Frequency Division Multiple Access (FDMA)/Time Division Multiple Access (TDMA) based cellular mobile network invoking the 7-cell Fixed Channel Allocation (FCA) algorithm and a Dynamic Channel Allocation (DCA) algorithm - the Locally Optimised Least Interference Algorithm (LOLIA) - in conjunction with frequency re-use exclusion zones of both 7 and 19 adjacent cells was investigated. Single element antennas, as well as two- and four-element adaptive antenna arrays located at the base stations were used and the system's performance was evaluated in a Line-Of-Sight (LOS) propagation environment. This work was then extended by investigating the network capacity, when subjected to a three-ray multipath channel, both with and without Power Control (PC). Furthermore, the potential network capacity gains achieved by Adaptive Quadrature Amplitude Modulation (AQAM) technique integrated with PC were also considered. Additionally, the effects of two different interference environments, namely the "desert-island" and the "wrap-around" scenarios on network capacity were studied.
Similarly, the network capacity of a Code Division Multiple Access (CDMA) based, Universal Mobile Telecommunication System (UMTS) Terrestrial Radio Access (UTRA)-like cellular mobile network was then investigated. The relative performance of four different soft handover algorithms was compared in terms of the network capacity, size of the Active Base station Set (ABS) and the mean transmission powers, for both non-shadowed and log-normal shadow faded propagation environments. The capacity gains achieved with the advent of two- and four-element adaptive antenna arrays were then investigated, under both non-shadowed and shadow-faded conditions. Further results were presented, whilst performing independent up- and down-link beamforming. Finally, the performance benefits of AQAM both with and without beamforming, in conjunction with shadow fading were determined.
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Published date: 2001
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Local EPrints ID: 464325
URI: http://eprints.soton.ac.uk/id/eprint/464325
PURE UUID: 55dd9af4-da53-42e8-87ef-aeba4b1654a2
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Date deposited: 04 Jul 2022 22:16
Last modified: 16 Mar 2024 19:25
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Author:
Jonathan S Blogh
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