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Outbound signal detector system and method

  • US 5,198,796 A
  • Filed: 06/27/1991
  • Issued: 03/30/1993
  • Est. Priority Date: 06/27/1991
  • Status: Expired due to Term
First Claim
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1. In a communication system in which outbound information is carried by cyclic waveforms over an electric power distribution network, said information being transmitted in the form of multi-bit messages, a signal detection method for detecting the outbound messages at a location physically separated from the source of the outbound messages, said signal detection method comprising:

  • (a) obtaining signal data by sampling the cyclic waveform over a predetermined portion of successive cycles;

    (b) dividing the predetermined portion into a plurality of predetermined ranges;

    (c) from a predetermined number of bits at the start of each message, selecting the particular predetermined range which contains the greatest signal strength;

    (d) for the remaining bits of the message, analyzing only those samples in the selected range to detect the outbound message.

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