Abstract :
Engineers have been looking at ways of broadcasting a digital radio service to the general public, which would ideally have the following features: sound quality comparable with that of the CD; reliable reception to all listeners in the coverage area; capability of offering coverage of all listeners; capability of fixed, mobile and portable reception using simple low grains antennas; simple push-button programme selection-no tuning; frequency efficiency, so that many services can be provided in any spectrum available; and capability of operation from terrestrial transmitters and/or satellite. The author describes the requirements of a digital audio broadcasting system regarding intersymbol interference and then discusses COFDM, coded-orthogonal frequency division multiplex. The author also discusses low-bit-rate sound, terrestrial transmission, satellite broadcasting, receivers, frequency allocation and system testing
Keywords :
digital radio systems; direct broadcasting by satellite; frequency division multiplexing; intersymbol interference; radio broadcasting; COFDM; coded-orthogonal frequency division multiplex; digital radio broadcasting; digital radio service; frequency allocation; intersymbol interference; low-bit-rate sound; receivers; satellite broadcasting; terrestrial transmission; testing;
