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Transmitter modulated with three modulation patterns

  • US 4,103,238 A
  • Filed: 11/26/1976
  • Issued: 07/25/1978
  • Est. Priority Date: 11/26/1976
  • Status: Expired due to Term
First Claim
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1. A modulated carrier wave transmitter comprising in combination;

  • a carrier generator to generate a carrier wave;

    means establishing first and second different modulation frequencies;

    means establishing time sequential control signals;

    modulation means connected to modulate said carrier wave by said first and second modulation frequencies in first, second and third modulation patterns, comprising;

    first means connected to modulate said carrier wave with said first modulation frequency in accordance with said sequential control signals to establish said first modulation pattern of said carrier wave for at least one bit period, a bit period being the time period required for the transmission of one complete interval of the first, second or third modulation pattern,second means connected to modulate said carrier wave with said second modulation frequency in accordance with said sequential control signals to establish said second modulation pattern of said carrier wave for at least one bit period,and third means connected to modulate said carrier wave with said first modulation frequency and sequentially with said second modulation frequency in accordance with said sequential control signals to establish said third modulation pattern of said carrier wave for at least one bit period, the signal being transmitted containing all three modulation patterns.

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