System and method for controlling a transmitter frequency
US6281935A · kind A · utility
36Cited by
6References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1998 |
| Grant date | Aug 28, 2001 |
| Priority date | — |
| Expiry date | Mar 23, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/4446
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method for controlling the frequency of a signal being transmitted wherein the frequency of the signal received at the transmitter site is error corrected before being broadcast. The error in the frequency may be developed and applied to the intermediate frequency upconversion and/or the channel upconversion to reduce or eliminate the effects of the error. In the system and method, a pilot frequency signal can be added to the signal to be broadcast after the signal to be broadcast has been shaped and filtered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.