Now showing items 1-10 of 13
Video object segmentation and tracking.
One of the more complex video processing problems currently vexing researchers is that of object segmentation. This involves identifying semantically meaningful objects in a scene and separating them from the background. ...
Frequency synchronization in multiuser OFDM-IDMA systems.
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 ...
Clear-air analytical and empirical K-Factor determination and characterization for terrestrial microwave LOS link applications.
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 ...
Modeling of raindrop size distribution and critical diameters for rainfall attenuation over microwave links in Southern Africa.
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 ...
Primary user emulation attack mitigation in cognitive radio networks.
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 ...
Power line communication (PLC) channel measurements and characterization.
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 ...
Determination of millimetric signal attenuation due to rain using rain rate and raindrop size distribution models for Southern Africa.
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 ...
Power line communication channel modelling.
Hybrid media streaming architecture, focussing on quantification of scalability of media streaming architectures, including streaming protocal evaluation.
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 ...
A DSP-enhanced AC susceptometer for characterisation of high temperature superconductors.
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 ...