Title: Single and multiple sinewave modulation and demodulation techniques
Application Number: 200580011486 Application Date: 2005.04.14
Publication Number: 1943198 Publication Date: 2007.04.04
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H04L27/02;H04L27/28;H03C1/00
Applicant(s) Name: Data Flow Technologies Inc. Address:
Inventor(s) Name:
Attorney & Agent: wangyuan fang liuguo wei
Abstract:
    A method for detecting encoded digital data from a substantially sinusoidal waveform, the encoded digital data having one of a first value and a second value at selected phase angles thetan comprises generating the waveform having an amplitude Y defined by a first function at phase angles lying outside of regions having a range Deltatheta beginning at each phase angle thetan, said first function being Y = sintheta; generating the waveform having an amplitude Y defined by the first function at phase angles lying inside the regions having a range of Deltatheta beginning at each phase angle thetan where data of the first value is to be encoded; and generating the waveform having an amplitude Y defined by a second function at phase angles lying inside the regions having a range of Deltatheta associated with each phase angle thetan where data of the second value is to be encoded, the second function being different from Y = sintheta, the detection including deriving sync pulses from minima and maxima of the substantially sinusoidal waveform to frame data words.
Time: 6