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Browsing by Author "Johnson, David L"

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A correlation between RSSI and height in UHF band and comparison of geolocation spectrum database view of TVWS

Author: Maliwatu, R ; Lysko, Albert A ; Johnson, David L ; Hadzic, S Date: Dec 2016 An investigation into the Received Signal Strength Indicator (RSSI) dependency on receiver antenna height in UHF band is conducted. The results show a high correlation between RSSI and height on channels with high signal strength. There is ... Read more
Malawi and South Africa pioneer unused TV frequencies for rural broadband

Author: Johnson, David L ; Mikeka, C Date: Sep 2016 At Mulanje Secondary School, in Malawi’s verdant tea-growing district, something remarkable is happening: Students and teachers now have broadband access to the Internet for the first time, thanks to an over-the-air network that connects the ... Read more
The shortcomings of globalised internet technology in Southern Africa

Author: Johnson, David L ; Van Stam, G Date: Dec 2016 Network protocols and applications have mostly been developed in and for a Western context and usually have an embedded set of assumptions about network performance and availability. As a result web-browsing, cloud-based services, live voice ... Read more

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Browsing by Author "Johnson, David L"

Browsing by Author "Johnson, David L"

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