Now showing items 1-10 of 15
Characteristics of rain at microwave and millimetric bands for terrestrial and satellite links attenuation in South Africa and surrounding islands.
The emergence of a vast range of communication devices running on different types of technology has made convergence of technology become the order of the day. This revolution observed in communications technology has ...
A semi-empirical formulation for determination of rain attenuation on terrestrial radio links.
Advances in today’s fast growing communication systems have resulted in congestion in the lower frequency bands and the need for higher capacity broadband services. This has made it inevitable for service providers to ...
An investigation of various hydrocarbon sources in the production of carbon nanoparticles via a plasma enhanced chemical vapour deposition technique.
A simple, low cost microwave plasma enhanced chemical vapour deposition (PECVD) technique for the production of carbon nanostructures has been developed in the School‟s Materials Science Laboratory. The technique utilises ...
Clear-air radioclimatological modeling for terrestrial line of sight links in Southern Africa.
This thesis has investigated radioclimatological study in a clear-air environment as applicable to terrestrial line of sight link design problems. Radioclimatological phenomena are adequately reviewed both for the precipitation ...
Packet scheduling in satellite HSDPA networks.
The continuous growth in wireless networks is not showing any sign of slowing down as new services, new technologies and new mobile users continue to emerge. Satellite networks are expected to complement the terrestrial ...
Performance analysis and enhancement schemes for spatial modulation.
Multiple-input multiple-output (MIMO) technology has emerged as a popular technique for enhancing the reliability and capacity of wireless communication systems. In this dissertation, we analyze the spatial modulation (SM) ...
Trust establishment in mobile ad hoc networks.
The central focus of this dissertation is mobile ad hoc networks (MANETs) and their security. MANETs are autonomous networks of wireless nodes connected in an ad hoc manner, and have unique characteristics ...
Channel estimation for SISO and MIMO OFDM communications systems.
Telecommunications in the current information age is increasingly relying on the wireless link. This is because wireless communication has made possible a variety of services ranging from voice to data and now to multimedia. ...
Repeat-punctured turbo coded cooperation.
Transmit diversity usually employs multiple antennas at the transmitter. However, many wireless devices such as mobile cellphones, Personal Digital Assistants (PDAs), just to name a few, are limited by size, hardware ...
Survivability stategies in all optical networks.Survivability stategies in all optical networks.
Recent advances in fiber optics technology have enabled extremely high-speed transport