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The demand for radio spectrum has continued to grow in recent years. Fortunately, technology has continued to evolve. Modern wireless devices use frequencies up to perhaps 10 GHz, with specialised microwave systems now operating as high as the E-band (around 80 GHz). Even higher frequencies, into the optical band, are being contemplated. This article provides background to the recent developments in policy formulation for TV whitespace wideband networks in South Africa.
Paper by Chris Burger and Dr. Moshe Masonta, CSIR Meraka Institute, attached in PDF.

Detailed presentation on the theme by professor Raj Jain, Washington University in Saint Louis.
Source: https://www.cse.wustl.edu/~jain/cse574-14/ftp/j_09wsp.pdf

TV white space (TVWS) geolocation database is being used for the protection of the terrestrial TV broadcast receivers, and the coexistence of secondary devices. To the best of our knowledge, though TV White Space calculations are available, an active online database does not exist for India. In this paper, the development of the first TVWS database for India is detailed and is released for public access. A standardized protocol to access the TVWS database on a readily available hardware platform is implemented.

Steve Song reports on the Dynamic Spectrum Alliance Summit (London, 1-3 of May, 2018).
Source: https://manypossibilities.net/2018/05/dynamic-spectrum-in-africa-in-2018/
At the end is the link to the cloud repository of presentations and videos of the DSA summits in Bogotá (2016), Cape Town (2017), and London (2018).