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Digital broadcast system

  • US 5,912,917 A
  • Filed: 06/08/1993
  • Issued: 06/15/1999
  • Est. Priority Date: 10/18/1990
  • Status: Expired due to Term
First Claim
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1. A digital audio broadcast (DAB) system, comprising:

  • a master DAB radio broadcast station located at a main predetermined terrestrial location for formatting and broadcasting a plurality of channels of digitized program data in a spread spectrum, time and frequency hopping waveform to remote mobile and stationary receivers,a plurality of relatively low power DAB range extension radio broadcast stations, each said range extension DAB station being located in respective terrestrial areas having selected population densities and each range extension DAB station having means to receive and store (delay) one or more channels of program information from said master DAB station,a separate program distribution system coupling said means to receive and store at each of said range extension DAB radio broadcast station with said master DAB radio broadcast station, andmeans to synchronize channels of digital data re-broadcast from each of said range extension DAB radio broadcast stations with broadcasts from said master DAB radio broadcast station such that a mobile receiver traveling between edges of reception of two or more low power range extension DAB radio broadcast stations does not evidence interference therebetween.

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