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Method and means of minimizing simulcast distortion in a receiver when using a same-frequency repeater

  • US 4,363,129 A
  • Filed: 12/11/1980
  • Issued: 12/07/1982
  • Est. Priority Date: 12/11/1980
  • Status: Expired due to Term
First Claim
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1. A method of minimizing simulcast distortion when broadcasting an information signal directly to an FM receiver and indirectly to the FM receiver through a same-frequency repeater comprising the steps of:

  • generating an RF signal that is amplitude-modulated with the information signal and that is frequency-modulated with the information signal delayed by a predetermined length of time;

    broadcasting the RF signal to the FM receiver and to the same-frequency repeater;

    detecting the amplitude-modulated signal at the same-frequency repeater and applying the detected signal as frequency modulation to a repeater to produce a repeated RF signal that is inherently delayed in the repeater by the predetermined length of time; and

    broadcasting the repeated RF signal to the FM receiver;

    whereby the RF signal and the repeated RF signal will both be delayed at the FM receiver, by essentially the predetermined length of time, thereby minimizing simulcast distortion.

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