| 摘要 |
Improvement of an existing DAB transmission system, so that a higher net dat a rate can be achieved while maintaining the same system quality, or the same system quality can be achieved with a much lower signal-to-noise ratio on the receiver side at the same net data rate. A symbol mapper is connected directly downstream from a convolution encoder instead of to the block generator, as in the case of the DAB system. A multi - stage channel encoder, to which the data substreams of a source date stream are distributed, is used. The source data stream is processed on the complex symbol level and no t on the bit level, as in the case of known DAB systems.
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