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BBC R&D White Paper WHP058

Diversity Reception of Digital Terrestrial Television (DVB-T)
Justin Mitchell and John Green

Keywords
LSI Logic, L64782

Abstract
Using the European standard for digital terrestrial television, DVB-T, it is possible to achieve more robust reception by using more than one receiving antenna and combining the signals from the separate antennas in the digital processing as part of the normal COFDM demodulation process. The improved reception that this technique offers can be used to increase transmission reliability to both portable television sets and to mobile television receivers, such as those found in cars. The necessary circuitry to implement diversity reception is now implemented in the latest consumer DVB-T integrated circuits. This paper begins with a description of diversity reception and then outlines a set of mobile measurements that were made in a car in London and a set of measurements that were made to illustrate how diversity reception can be used to improve reception to portable television receivers.