Method and apparatus for transmitting intelligence over a carrier wave
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United States of America Patent
Stats
-
Aug 19, 1980
Issued Date -
N/A
app pub date -
Dec 14, 1977
filing date -
Jul 17, 1974
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for transmitting intelligence over a carrier wave are disclosed in which a signal waveform is added to a carrier wave to produce a composite wave having a recognizable pattern of variations in intervals that are defined by preselected locations in the composite wave. The pattern of variations in intervals resulting from the addition of the signal waveform to the carrier wave represents at least a portion of the intelligence to be transmitted over the carrier wave. The variations in intervals defined by the preselected locations in the carrier waves are detected and the detected interval variations are converted into a signal which has a characteristic that is a function of the recognizable pattern of interval variations. In the preferred embodiment the intelligence is transmitted over an electric power distribution network utilizing the alternating voltage therein as the carrier wave.
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