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SSB System with pilot coded squelch

  • US 4,541,118 A
  • Filed: 12/22/1983
  • Issued: 09/10/1985
  • Est. Priority Date: 12/22/1983
  • Status: Expired due to Fees
First Claim
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1. A single sideband communications system for conveying a message through a transmitter to at least one predetermined receiver and employing a coded squelch signal unique to that receiver, comprising:

  • means for generating and transmitting a radio frequency signal comprising a single sideband signal and pilot both angle modulated with the coded squelch signal at a predetermined deviation;

    means for receiving the radio frequency signal and tracking to predetermined limits the frequency excursions of said pilot so as to essentially eliminate frequency distortion of the message;

    means for demodulating the single sideband signal; and

    means for demodulating the coded squelch signal from said received radio frequency signal in cooperation with said frequency excursion tracking means thereby avoiding interference to said single sideband signal demodulating means and said frequency tracking means.

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