Propagation modelling for white space geo-location databases

White space radio networks have achieved acceptance in principal by radio regulators across the world. The challenges associated with accurately sensing the availability of the channel without knowing the details of the current shadowing environment have lead to a tendency toward requiring a geo-location database approach for determining available bands as was required by Ofcom [1]. This provides regulators with a central point of control from which they can ensure primary users are protected. However to provide the initial database a reliable and verifiable dataset for an entire country is required, at a high resolution (100m cells is recommended in the UK [1]). In this paper such a model, based on the Parabolic Equation Model, is presented and the results of field trials to confirm the model validity are discussed.