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Radio frequency communications systems and methods employing single and multiple sinewave modulation and demodulation techniques

  • US 7,313,200 B2
  • Filed: 05/15/2006
  • Issued: 12/25/2007
  • Est. Priority Date: 04/16/2004
  • Status: Expired due to Fees
First Claim
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1. A communications system comprising:

  • a wireless radio frequency communications medium;

    a first station including;

    an encoder for generating at least one waveform containing encoded digital data at selected phase angles θ

    n, the waveform having an amplitude Y=sin θ

    at phase angles lying outside of data regions, the waveform having an amplitude Y=sin θ

    at phase angles lying inside the data regions having a range of Δ

    θ

    beginning at each phase angle θ

    n where data of the first value is to be encoded, the waveform having an amplitude Y defined by a function different from Y=sin θ

    at phase angles lying inside the data regions having a range of Δ

    θ

    beginning at each phase angle θ

    n where data of the second value is to be encoded;

    a transmitter for transmitting the at least one waveform containing encoded digital data through the wireless radio frequency communications medium;

    a second station coupled to the first station through the wireless radio frequency communications medium and including;

    a receiver for receiving the at least one waveform containing encoded digital data through the wireless radio frequency communications medium from the first station; and

    a decoder for extracting the digital data from the at least one waveform containing encoded digital data.

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