Digital Radio Mondiale: DRM, digital radio on long, medium and short waves - another radio revolution?
This document publishes the slides used in a lecture given to the IEE Surrey Branch on 17 November 2004. It gives an overview of DRM: what it is, why it is needed, and who has done it. It goes on to explain some details of the system and how it works (both audio source coding and the COFDM modulation scheme) with, in the case of the lecture itself, some demostrations not reproducible here. This is followed by a description of receiver architectures, including some examples of receivers designed or part-designed by the BBC R&D team, and the necessary transmission infrastructure needed by a broadcaster. Finally an account is given of a range of field trail experiments, with examples drawn from BBC R&D experience.
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