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Method and apparatus for transmitting intelligence over a carrier wave

  • US 4,106,007 A
  • Filed: 07/01/1975
  • Issued: 08/08/1978
  • Est. Priority Date: 07/17/1974
  • Status: Expired due to Term
First Claim
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1. A method of transmitting digital intelligence over a power line having a pre-existing alternating wave thereon, said method comprising the steps of:

  • 1. combining a signal wave with said pre-existing alternating wave on the power line to produce a composite wave having a recognizable pattern of variations in the durations of the intervals defined by preselected locations in the composite wave, said pattern of variations in the durations of the intervals representing at least a portion of the digital intelligence to be transmitted; and

    ,2. extracting from the composite wave the digital intelligence represented by the pattern of variations in interval durations therein.

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