DAB MICRO-TRANSMITTERS FOR INSERTION OF LOCAL WINDOWS

By incorporating micro-transmitters into a a given DAB-SFN (Digital Au dio Broadcasting - Single Frequency Network), service providers are ab le to replace the information content of a specified single channel in side the predefined ensemble so that it is of local interest. There mu st be no interference with neighbouring channels, which must still be receivable within the small radiation field (e.g. 300 m(2)) of the mic ro-transmitter without loss of information content. The consequent tec hnical problems are analysed and discussed and measurements are report ed which were derived from an experiment setup to demonstrate the oper ating principle. Conclusions and outlook are given.