Adaptive variable-gain phase and frequency locked loop for rapid carrier acquisition
US5450447A · kind A · utility
20Cited by
20References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1992 |
| Grant date | Sep 12, 1995 |
| Priority date | — |
| Expiry date | Sep 30, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/095
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for improving the performance of a satellite communications modem is disclosed. The invention is particularly applicable to mobile satellite receivers, and includes a variable-gain automatic frequency controlled (AFC) loop, the gain of which is controlled adaptively, based on the AFC lock status and the lock status of the modem's inner loop, in addition to other parameters determined by the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.