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Data communications

  • US 8,942,298 B2
  • Filed: 12/11/2006
  • Issued: 01/27/2015
  • Est. Priority Date: 12/09/2005
  • Status: Active Grant
First Claim
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1. Data communication apparatus comprising:

  • a coder adapted to receive data for transmission, and to encode a data bit or data word from the received data by identifying, from a set of frequency ratios, a frequency ratio that encodes the data bit or data word according to a predetermined coding scheme, wherein the set of frequency ratios consists of a number of frequency ratios, said number being more than two and an integer power of two; and

    a transmitter;

    wherein the coder is further adapted to cause the transmitter to transmit a pair of frequencies having the identified frequency ratio, thereby transmitting the coded data bit or data word.

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