A TRANSMISSION SYSTEM FOR DIGITAL AUDIO BROADCASTING USING PSEUDO-RANDOM NUMBER SEQUENCES IN FRAME HEADERS

摘要

A digital audio broadcasting (DAB) system includes a radio-frequency (R F) transmitter and a corresponding RF receiver. The RF transmitter formats a DA B signal into a sequence of frames, each frame having a header comprising a predefined grouping of pseudo- random number sequences comprising 100 symbols. Of these 100 symbols, 86 symbols of the header are used for frame synchronization and channel sounding (for characterization of a communications channel), while the remaining 14 symbols are used for interleaver and data synchronization in an interleaved fashion.