Satellite communications systems and methods employing single and multiple sinewave modulation and demodulation techniques
US7310384B2 · kind B2 · utility
Inventors
Key dates
| Filing date | May 15, 2006 |
| Grant date | Dec 18, 2007 |
| Priority date | — |
| Expiry date | May 15, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2602
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for generating a substantially sinusoidal waveform containing encoded digital data having one of a first value and a second value at selected phase angles θn comprises generating the waveform having an amplitude Y defined by a first function at phase angles lying outside of regions having a range Δθ beginning at each phase angle θn, said first function being Y=sin θ; generating the waveform having an amplitude Y defined by the first function at phase angles lying inside the regions having a range of Δθ beginning at each phase angle θn 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 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.