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Performance analysis of WCDMA downlink systems with antenna array

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Performance analysis of WCDMA downlink systems with antenna array

Qin, Meiyu (2005) Performance analysis of WCDMA downlink systems with antenna array. Masters thesis, Concordia University.

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Abstract

The work of the thesis begins with a study of the physical layer tasks of WCDMA systems, including some key techniques and channel structures for both downlink and uplink with an emphasis on the downlink common pilot channel and the time-multiplexed pilot symbol structure. Multipath fading effects and Rake receiver techniques are also covered. These techniques and channel configurations are then used for the simulation of the entire WCDMA downlink system. The second part of this thesis is concerned with antenna array processing techniques and the performance of a two-element antenna that can easily be incorporated into mobile handsets. A simulation study of an antenna array receiver is carried out for various parameters and different combining schemes. The main contribution of the thesis is in the investigation of the downlink performance of a WCDMA system using an adaptive antenna array. Both temporal and spatial diversities are taken into account in the simulation. Based on the WCDMA specification, it is found that the spatial-temporal receiver with n/4 (3.5cm) distance between the antenna elements can provide strong beamforming capability. The diversity gain of a smart antenna system with different combining schemes is also examined. It is shown that when both spatial and temporal signal processing techniques are combined, the multiple access interference and the multipath fading effect can be significantly mitigated or eliminated

Divisions:Concordia University > Faculty of Engineering and Computer Science > Electrical and Computer Engineering
Item Type:Thesis (Masters)
Authors:Qin, Meiyu
Pagination:xiv, 96 leaves : ill. ; 29 cm.
Institution:Concordia University
Degree Name:M.A. Sc.
Program:Electrical and Computer Engineering
Date:2005
Thesis Supervisor(s):Zhu, Wei-Ping
ID Code:8445
Deposited By:Concordia University Libraries
Deposited On:18 Aug 2011 14:25
Last Modified:18 Aug 2011 14:25
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