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Digital signal processing for PLC communications having communication frequencies

  • US 9,503,157 B2
  • Filed: 05/27/2014
  • Issued: 11/22/2016
  • Est. Priority Date: 12/22/2011
  • Status: Active Grant
First Claim
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1. A circuit-based apparatus comprising:

  • a transceiver circuit configured and arranged to communicate data over power distribution lines that carry power using alternating current (AC); and

    a logic circuit configured and arranged togenerate an input digital signal from an analog signal received at the transceiver circuit,produce, in response to a variable decimation rate, a decimated input digital signal, andin response to an indication of change in a phase difference between a reference signal and the AC, control the decimation rate to counteract the phase difference; and

    a reference signal generator module configured to generate the reference signal having a frequency responsive to the decimation rate, and wherein the reference signal generator module is configured and arranged to generate the reference signal using a direct digital synthesizer.

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