Digital modulation and shift keying
US7359455B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 3, 2003 |
| Grant date | Apr 15, 2008 |
| Priority date | — |
| Expiry date | Oct 17, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03C3/02
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention discloses an apparatus and a method of modulating a carrier with digital information having a series of datums represented in a plurality of symbols, the method comprising selecting a first number of half-periods of a first phase distinguished carrier signal for representing a corresponding symbol of a first one of the datums, selecting a second number of half-periods of a second phase distinguished carrier signal for representing a corresponding symbol of the datum following the first datum, determining at least one matching carrier signal having a third number of half-periods of a format to conform to a transition of the first phase distinguished carrier signal to the second phase distinguished carrier signal, and sequentially arranging the first number of half-periods of the first phase distinguished carrier signal, the third number of half-periods of the matching carrier signal and the second number of half-periods of the second phase distinguished carrier signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.