Patent ID: 7310384

Claim:
A communications system comprising: a satellite 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 Δθ 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 Δθ 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 satellite communications medium; a second station coupled to the first station through the satellite communications medium and including: a receiver for receiving the at least one waveform containing encoded digital data through the satellite communications medium from the first station; and a decoder for extracting the digital data from the at least one waveform containing encoded digital data.