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

A communications system for communicating in a wireless radio frequency communications medium and comprising:

• a first station;
• a second station coupled to the first station through the wireless radio frequency communications medium:
• wherein the first and second stations each include:
• an encoder for generating at least one waveform containing encoded digital data at selected phase angles θn, 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 Δθ beginning at each phase angle θn where data of the first value is to be encoded, the waveform having an amplitude Y defined by a different from Y=sin θ at phase angles lying inside the data regions having a range of Δθ associated with each phase angle θn 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 receiver for receiving the at least one waveform containing encoded digital data through the wireless radio frequency communications medium;
• and
• a decoder for extracting the digital data from the at least one waveform containing encoded digital data.

A communications system for communicating in a wireless radio frequency communications medium and comprising:

• a first station;
• a second station coupled to the first station through the wireless radio frequency communications medium:
• wherein the first and second stations each include:
• a first station including:
• a plurality of encoders for generating a plurality of waveforms each having a different frequency and containing encoded digital data having one of a first value and a second value at selected phase angles θn comprising generating each waveform having an amplitude Y defined by a first function at phase angles lying outside of data regions, the first function being Y=sin θ, generating each waveform having an amplitude Y defined by the first function at phase angles lying inside the data regions having a range of Δθ beginning at each phase angle θn where data of the first value is to be encoded, and generating each waveform having an amplitude Y defined by a second function at phase angles lying inside the data regions having a range of Δθ associated with each phase angle θn where data of the second value is to be encoded, the second function being different from Y=sin θ;
• a transmitter coupled to the wireless radio frequency communications medium for transmitting the plurality of waveforms containing encoded digital data through the wireless radio frequency communications medium;
• a second station including:
• a receiver coupled to the wireless radio frequency communications medium for receiving the plurality of waveforms containing encoded digital data through the wireless radio frequency communications medium from the first station;
• and
• a plurality of decoders for extracting the digital data from the plurality of waveform containing encoded digital data.