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Statistical modelling and reduction of multiple access interference power in wideband DS-CDMA and MC-CDMA communications systems

Carey, Daniel. Statistical modelling and reduction of multiple access interference power in wideband DS-CDMA and MC-CDMA communications systems. PhD, Institut National Polytechnique de Toulouse, 2006

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Official URL: http://ethesis.inp-toulouse.fr/archive/00000522/

Abstract

Most standardisation bodies have based their 3G cellular systems on DS-CDMA (W-CDMA, UMTS, cdma2000). With 4G systems desiring improved services and quality of service standards, this thesis investigates mutlicarrier CDMA (MC-CDMA) as a genuine air interface candidate. A statistical model of the total MAI power incurred over the uplink channel is shown to be very accurately characterised by the Nakagami-m distribution for both asynchronous DS-CDMA and MC-CDMA techniques. Two new CDMA schemes, DF/DS-CDMA and DF/MC-CDMA, are proposed, based on the dual-frequency (DF) switching technique introduced in this thesis. These proposed DF schemes offer substantial MAI reduction upon asynchronous reception and clearly outperform (MAI and BER) the standard DS-CDMA and MC-CDMA systems, however, additional bandwidth is required.

Item Type:PhD Thesis
Uncontrolled Keywords:
Institution:French research institutions > Centre National des Etudes Spatiales - CNES
Université de Toulouse > Ecole Nationale de l'Aviation Civile - ENAC
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE
Other partners > Rockwell Collins (FRANCE)
Other partners > Thales (FRANCE)
Other partners > Telecom ParisTech (FRANCE)
Other partners > Direction Générale de l’Aviation Civile - DGAC (FRANCE)
Laboratory name:
Research Director:
Senadji, Bouchra and Roviras, Daniel
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Deposited By:admin admin

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