Two pilot frequency control for communication systems
US4466130A · kind A · utility
6Cited by
5References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 4, 1982 |
| Grant date | Aug 14, 1984 |
| Priority date | — |
| Expiry date | Oct 4, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/208
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Two pilot signals, derived so that there is a predetermined ratio between the frequency difference of the tones and the absolute frequency of either of the pilot signals, are transmitted from a reference station to each of a number of remote stations. At each receiving station, the frequency error is derived from the frequency difference of the two pilot signals, and this frequency error is used to adjust the frequency of the local oscillator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.