Wireless wideband DS-CDMA point-to-multipoint system for distance education services.
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Date
2001
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Abstract
A review of possible distance education services is given. These services range from
narrowband to broadband, from real to non-real time and from broadcast to fully interactive
services. The service target groups include the rural schools and communities who are
scattered in remote areas.
The performances of multiple access techniques, FDMA, TDMA and CDMA when in use for
the provision of point-to-multipoint multimedia services is compared. A hybrid of the satellite
and terrestrial access networks for the implementation of the distance education services is
presented.
The feasibility of implementing the proposed satellite network as part of the total network
using the FDMA technique is presented. The rest of the work done in the thesis concentrates
on the terrestrial network. The terrestrial part of the network is based on fixed cellular DS-CDMA
techniques.
The fixed cellular network's specifications, modeling and a discussion of the capacity, BER
performance, bandwidth requirements and coverage are presented. The link budget estimation
of the performance is given. Lastly a review of propagation characteristics for a terrestrial
rural environment and a review of DS-CDMA concepts are presented in the appendix.
Description
Thesis (M.Sc.Eng.)-University of Durban-Westville, 2001.
Keywords
Wireless communication systems., Telecommunication systems., Telecommunications--South Africa., Theses--Electrical engineering.