A. Geo-location databases
In principle, a geo-location database is a database that
contains up-to-date information on the spectrum available at
any given location and time instance, enriched with other
types of related information, such as the maximum transmitted
power or adjacent channel leakage ratio [3]. Geo-location
databases are populated with information created by modelling
the propagation of known incumbent transmitters (for example
as in [10]), where the model’s parameters and algorithms are