Single and multiple sinewave modulation and demodulation techniques, apparatus, and communications systems
US7310385B2 · kind B2 · utility
Assignee
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 primaryH04L27/00
- 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 data regions, the first function being Y=sin θ; generating the 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 the waveform having an amplitude Y defined by a second function 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. The third harmonic of the waveform may be generated and used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.