Method and apparatus for measuring phase error of a modulated signal
US7123665B2 · kind B2 · utility
8Cited by
2References
22Claims
0Family size
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Key dates
| Filing date | May 9, 2003 |
| Grant date | Oct 17, 2006 |
| Priority date | — |
| Expiry date | May 26, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D13/005
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for generating a burst FSK signal having precisely shaped transitions between modulation states. The apparatus uses feedforward compensation of phase gain and phase preemphasis coefficients for compensating the frequency conversion gain of the apparatus, and the phase gain coefficient is used for stabilizing a frequency synthesis loop. The phase gain and preemphasis coefficients are determined in a calibration within the time constraints of on-line signal bursts based upon measured phase errors and accelerated predicted phase gain and preemphasis phase errors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.