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Simulcast transmission system with improved synchronizing system

  • US 5,218,717 A
  • Filed: 12/31/1990
  • Issued: 06/08/1993
  • Est. Priority Date: 01/10/1990
  • Status: Expired due to Fees
First Claim
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1. A simulcast transmission system comprising:

  • a plurality of neighboring transmitting stations having overlapping individual broadcast ranges spatially arranged throughout a broadcast area and each including a first modulator for modulating a carrier frequency with a wanted signal in accordance with a first type of modulation, a second modulator for modulating the same carrier frequency with a unique auxiliary signal which uniquely identifies each transmitting station in accordance with a second type of modulation and a transmitter for transmitting the modulated carrier frequency; and

    at least one receiver for receiving the modulated carrier frequency and analyzing means for separately analyzing the different auxiliary signals and identifying each transmitter by its unique auxiliary signal.

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