Browsing Doctoral Degrees (Electronic Engineering) by Title
Now showing items 29-48 of 54
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Factors influencing the usage of web 2.0 tools in higher education.
(2019)The purpose of this study was to investigate the factors that influence the usage of Web 2.0 tools among academics in higher education in South Africa as well as the barriers that may arise when using these tools. Web 2.0 ... -
Hybrid token-CDMA MAC protocol for wireless networks.
(2009)Ad hoc networks are commonly known to implement IEEE 802.11 standard as their medium access control (MAC) protocol. It is well known that token passing MAC schemes outperform carrier-sense-multiple-access (CSMA) schemes, ... -
A MAC protocol for wireless networks with QoS guarantees.
(2002)Mobile communications are becoming integrated into society at an explosive rate. While 2nd generation (2G) systems limit the user to basic services such as voice and low-bit rate data, 3G networks are characterized by ... -
Mitigation techniques through spatial diversity combining and relay-assisted technology in a turbulence impaired and misaligned free space optical channel.
(2018)In recent times, spectrum resource scarcity in Radio Frequency (RF) systems is one of the biggest and prime issues in the area of wireless communications. Owing to the cost of spectrum, increase in the bandwidth allocation ... -
Modeling of raindrop size distribution and critical diameters for rainfall attenuation over microwave links in Southern Africa.
(2014)The inability of service providers to constantly meet the design target of 99.99 % availability of the line-of-sight (LOS) microwave links has caused concern among both the operators and consumers. The non-availability of ... -
Modelling and testing microwave magnetrons.
(1988)Though declining in popularity over the last decade, the magnetron still has applications where portable high power is needed. This study examines the predicted performance of cylindrical microwave magnetrons using ... -
Modelling of propagation path loss using adaptive hybrid artificial neural network approach for outdoor environments.
(2018)Prediction of signal power loss between transmitter and receiver with minimal error is an important issue in telecommunication network planning and optimization process. Some of the basic available conventional models in ... -
Multiple antenna systems : channel capacity and low-density parity-check codes.
(2005)The demand for high data rate wireless communication systems is evident today as indicated by the rapid growth in wireless subscribers and services. High data rate systems are bandwidth intensive but bandwidth is an expensive ... -
Multiscaling analysis and modelling of bursty impulsive noise in broadband power line communication channels.
(2017)Power line communication (PLC) networks have the potential to offer broadband application services to homes and small offices cheaply since no additional wiring is required for it implementation. However, like other ... -
Neural networks and early fast Doppler for prediction in meteor-burst communications systems.
(1994)In meteor-burst communications systems, the channel is bursty with a continuously fluctuating signal-to-noise ratio. Adaptive data rate systems attempt to use the channel more optimally by varying the bit rate. Current ... -
Non-binary compound codes based on single parity-check codes.
(2013)Shannon showed that the codes with random-like codeword weight distribution are capable of approaching the channel capacity. However, the random-like property can be achieved only in codes with long-length codewords. On ... -
Optimized digital signal processing algorithms applied to radio communications.
(1992)The application of digital signal processing to radio communications has come of age with the advent of low power, high speed microprocessors and over the past five years, various transceiver architectures, utilizing ... -
Packet scheduling in satellite LTE networks employing MIMO technology.
(2014)Rapid growth in the number of mobile users and ongoing demand for different types of telecommunication services from mobile networks, have driven the need for new technologies that provide high data rates and satisfy their ... -
Performance analysis of signalling system No. 7 networks during signalling transfer point congestion.
(2002)The growth of mobile networks and the imminent deployment of third generation networks and services will require signalling networks to maintain their integrity during increased unanticipated traffic volumes. As signalling ... -
Performance of a space-time coded multicarrier CDMA system in frequency-selective Rayleigh channel.
(2014)The increasing demand for wireless services requires fast and robust broadband wireless communication for efficient utilisation of the scarce electromagnetic spectrum. One of the promising techniques for future wireless ... -
Predicted and measured arrival rates of meteors over forward-scatter links.
(1991)Investigations into currently accepted methods of modelling variations in the arrival rate of meteors over forward-scatter meteor links have revealed some shortcomings. In these investigations, particular emphasis is ... -
A proportional timing generator for measuring intermodulation product distortion on television transposers.
(1989)Broadcasting authorities presently measure intermodulation distortion by applying a three tone simulation of a composite video and sound signal to the transposer and then measuring the relative amplitude of the major ... -
Protocols for voice/data integration in a CDMA packet radio network.
(1999)Wireless cellular communications is witnessing a rapid growth in, and demand for, improved technology and range of information types and services. Future third generation cellular networks are expected to provide mobile ... -
Queueing theory approach to rain fade analysis at microwave and millimeter bands in tropical Africa.
(2014)With an overwhelming demand of larger bandwidth required for high capacity data with content-rich services ranging from high-speed video streaming to multimedia content, there is a continuous need to migrate to higher ... -
Radio wave propagation modeling under precipitation and clear-air at microwave and millimetric bands over wireless links in the horn of Africa.
(2017)Abstract available in PDF file.