Frequency synthesis loop having controlled loop gain
US7127020B2 · kind B2 · utility
7Cited by
2References
26Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 9, 2003 |
| Grant date | Oct 24, 2006 |
| Priority date | — |
| Expiry date | Jun 8, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2017
- WIPO fieldDigital communication
- 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.