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Browsing by Subject "IEEE Africon 2011"

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Beam steering for circular switched parasitic arrays using a combinational approach

Author: Mofolo, ROM ; Lysko, Albert A ; Olwal, TO ; Clarke, WA Date: Sep 2011 In this paper, the authors present a method of electronic beam steering for circular switched parasitic array (SPA) antennas. In circular SPA antennas, one achieves azimuth beam steering by open-circuiting and short-circuiting different ... Read more
Coupled interference based rate adaptation in ad hoc networks

Author: Awuor, F ; Djouani, K ; Noel, G ; Olwal, T Date: Sep 2011 Link adaptation provides an efficient and flexible strategy to adapt transmission rates based on channel conditions. To attain distributed optimal local and global utility, network interference need to be mitigated therein allowing the users ... Read more
Enabling mobile/wireless broadband technologies and services for the next billion users

Author: Mekuria, Fisseha Date: Sep 2011 As wireless devices and the useful services they can deliver become more pervasive and affordable; the need for wireless broadband technologies meeting the demands of emerging market countries is growing. In this paper the technology choice ... Read more
Pedestrian detection for underground mine vehicles using thermal images

Author: Dickens, JS ; Van Wyk, MA ; Green, JJ Date: Sep 2011 Mine vehicles are a leading cause of mining fatalities. A reliable anti-collision system is needed to prevent vehicle-personnel collisions. The proposed collision detection system uses the fusion of a three-dimensional (3D) sensor and thermal ... Read more
Survey of wireless sensor network applications from a power utility’s distribution perspective

Author: Isaac, Sherrin J ; Hancke, GP ; Madhoo, H ; Khatri, A Date: Sep 2011 The task of monitoring and controlling power distribution networks is very challenging given the huge number of assets involved and their wide geographic distribution; this frames a role for wireless sensor network (WSN) applications. This ... Read more
Systematic Luby Transform codes as incremental redundancy scheme

Author: Grobler, TL ; Ackermann, ER ; Olivier, JC ; Van Zyl, AJ Date: Sep 2011 Systematic Luby Transform (fountain) codes are investigated as a possible incremental redundancy scheme for EDGE. The convolutional incremental redundancy scheme currently used by EDGE is replaced by the fountain approach. The results of the ... Read more

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Browsing by Subject "IEEE Africon 2011"

Browsing by Subject "IEEE Africon 2011"

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