The UK/European framework for access to the UHF TV band by white space devices (WSDs) is predicated on the communication of information on TV white space (TVWS) availability from white space databases (WSDBs) to WSDs. This information is in the form of location- and frequency-specific maximum permitted WSD radiated power levels. These levels are calculated in such a way so as to afford protection to the two incumbent (licensed) uses within the band, namely Digital Terrestrial Television (DTT), and Programme Making and Special Events (PMSE), as well as users of spectrum outside the band. In this paper we first outline the proposed framework for access to TV white spaces in the UK, describing the interactions between the regulator, WSDBs and WSDs. We then present the calculations required for the computation of maximum permitted WSD radiated power levels, accounting for nationwide DTT coverage and PMSE assignments.
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