Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2011. / ENGLISH ABSTRACT: Keywords: digital signal processing, embedded systems, telecommunications,
satellite technology.
The rapid growth of the telecommunications industry is a worldwide phenomenon
with people and computers generating and transmitting more and
more information daily. Despite this growth, there are still areas in South
Africa which lack terrestrial communications coverage. People inhabit these
rural areas and their essential communication needs are not met. Satellite
based communication coverage can provide a valuable service in these circumstances.
In this thesis, the design of a satellite-based communications payload
which makes use of software de ned radio techniques is presented in terms
of the Open Systems Interconnect layer structure. A robust hardware platform
using a space-quali ed on-board computer, a Xilinx Virtex-5 Field Programmable
Gate Array (FPGA) and a Freescale digital signal processor (DSP)
is designed, implemented and thoroughly tested. A device driver is designed
for hardware and rmware components. A prototype ground station is also
designed and constructed using a low-power PC, a Xilinx Spartan-3E FPGA,
a Freescale DSP and radio frequency hardware.
A wide range of testing methodologies were successfully utilised to deploy
a functional system which is critically evaluated in the last chapter. / AFRIKAANSE OPSOMMING: Sleutelwoorde: syferseinverwerking, toegewyde stelsels, telekommunikasie,
satelliettegnologie.
Die vinnig groeiende telekommunikasieindustrie is 'n wêreldwye verskynsel
waarin mense en rekenaars daagliks meer en meer data genereer. Ten spyte
van die groei, is daar nog steeds gebiede in Suid-Afrika wat aan 'n gebrek van
aardse kommunikasiedekking lei. Mense bewoon dié areas maar daar word nie
aan hul noodsaaklike kommunikasiebehoeftes voldoen nie. Satelliet-gebaseerde
kommunikasiedekking kan 'n waardevolle diens in hierdie omstandighede wees.
Hierdie tesis beskryf die ontwerp van 'n ruimtegebaseerde kommunikasieloonvrag
wat gebruik maak van sagteware-gede nieerde radiotegnieke aangebied
in terme van die Open Systems Interconnect laagstruktuur. 'n Robuuste
apparatuurplatform wat gebruik maak van 'n ruimte-gekwali seerde rekenaar,
'n Xilinx Virtex-5 Veldprogrameerbare Hek-Skikking (VPHS) en 'n Freescale
syferseinverwerker is ontwerp, geïmplementeer en deeglik getoets. 'n Toestelbestuurder
moes ontwerp word vir die apparatuur- en fermatuur-komponente.
'n Prototipe grondstasie is ook ontwerp en gebou met behulp van' n lae-krag
PC, 'n Xilinx Spartan-3E VPHS, 'n Freescale seinverwerker en radiofrekwensie
apparatuur.
'n Wye verskeidenheid van toetsmetodes is suksesvol benut om 'n funksionele
stelsel te ontwikkel wat krities geëvalueer word in die laaste hoofstuk.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/6503 |
| Date | 03 1900 |
| Creators | Botha, Jakobus Stephanus |
| Contributors | Van Rooyen, G-J., University of Stellenbosch. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. |
| Publisher | Stellenbosch : University of Stellenbosch |
| Source Sets | South African National ETD Portal |
| Language | en_ZA |
| Detected Language | Unknown |
| Type | Thesis |
| Format | 97 p. : ill. |
| Rights | University of Stellenbosch |
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