Electronic Engineering: Recent submissions
Now showing items 21-40 of 160
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Alternative approach to Power Line Communication (PLC) channel modelling and multipath characterization.
(2016)Modelling and characterization of the Power Line Communication (PLC) channel is an active research area. The research mainly focuses on ways of fully exploiting the existing and massive power line network for communications. ... -
Development of a model helicopter based flight test platform for multivariable feedback control.
(2009)The dissertation describes the development of a model helicopter based flight test platform for implementing autonomous six degree of freedom flight by a multiple input multiple output automatic control system. The focus ... -
Research and design of an embedded controller and GUI for the automation of the armature Volt-Drop test.
(2009)In a rapidly evolving technological and industrialised society, automation is a current and growing trend. The concept is typically applied to uneconomical processes and extends from the automation of highly complex ... -
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 ... -
Primary user emulation attack mitigation in cognitive radio networks.
(2014)The rapid progress in the number of users and applications in wireless communication have led to the problem of growing spectrum scarcity in recent years. This imminent spectrum scarcity problem is in part due to a rapidly ... -
Queueing theory approach to rain fade analysis at microwave and millimeter bands in tropical Africa.
(2015-11-18)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 ... -
Cross-layer design for multimedia applications in cognitive radio networks.
(2015-11-18)The exponential growth in wireless services and the current trend of development in wireless communication technologies have resulted into an overcrowded radio spectrum band in such a way that it can no longer meet the ... -
Semi-blind channel estimation for multiuser OFDM-IDMA systems.
(2015-10-27)Over the last decade, the data rate and spectral efficiency of wireless mobile communications have been significantly enhanced. OFDM technology has been used in the development of advanced systems such as 3GPP LTE and ... -
Signal space diversity with and without Alamouti transmit diversity using generalised selection combining.
(2015-10-27)The first contribution is based on M-ary quadrature amplitude modulation (M-QAM) constellations with signal space diversity (SSD) using a single transmit and receive antenna system in the presence of Rayleigh fading. Two ... -
Power line communication (PLC) channel measurements and characterization.
(2014)The potential of the power line to transport both power and communication signals simultaneously has been realized and practiced for over a century, dating back to the 1900’s. Since the key aspect of power line communications ... -
A DSP-enhanced AC susceptometer for characterisation of high temperature superconductors.
(2014)DSP-based susceptometer was designed and implemented to study granular HTS Y1Ba2Cu3O7-x (YBCO) superconducting specimens. The AC susceptometer is made up of a primary coil driven by an AC signal and two sensing coils: a ... -
Channel characterization for broadband powerline communications.
(2015-06-10)The main limiting factor in broadband powerline communications is the presence of impedance discontinuities in the wired channel. This phenomenon is present in both outdoor and indoor powerline communication (PLCs) channels. ... -
Hierarchical modulation with signal space and transmit diversity in Nakagami-m fading channel.
(2013)Hierarchical modulation (HM) is a promising scheme for wireless image and video transmission, exploiting the benefits of unequal error protection to ensure enhanced system performance. However, there is a limiting factor ... -
Hybrid media streaming architecture, focussing on quantification of scalability of media streaming architectures, including streaming protocal evaluation.
(2014-11-10)An analysis of media streaming architectures is performed in this dissertation drawing focus to the advantages and disadvantages of the various architectures. Detailed examination is given to scalability of decentralized ... -
Clear-air analytical and empirical K-Factor determination and characterization for terrestrial microwave LOS link applications.
(2014-10-30)The transmission media, that is, the atmosphere, through which terrestrial and satellite signals traverse, is irregular. Thus, one requires proper knowledge on how variations in atmospheric refractive conditions will affect ... -
Power line communication channel modelling.
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Modeling of raindrop size distribution and critical diameters for rainfall attenuation over microwave links in Southern Africa.
(2014-09-15)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 ... -
Determination of millimetric signal attenuation due to rain using rain rate and raindrop size distribution models for Southern Africa.
(2014-09-15)The advantages offered by Super High Frequency (SHF) and Extremely High Frequency (EHF) bands such as large bandwidth, small antenna size, and easy installation or deployment have motivated the interest of researchers to ... -
Investigating the performance of generator protection relays using a real-time simulator.
(2013)Real-time simulators have been utilized to perform hardware-in-loop testing of protection relays and power system controllers for some years. However, hardware-in-loop testing of generator protection relays has until ... -
Frequency synchronization in multiuser OFDM-IDMA systems.
(2014-07-18)Various multiuser schemes have been proposed to efficiently utilize the available bandwidth while ensuring an acceptable service delivery and flexibility. The multicarrier CDMA became an attractive solution to the major ...