Auto-balance method and apparatus for suppression of residual lines in a transmitted spectrum
US4479227A · kind A · utility
13Cited by
4References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 2, 1982 |
| Grant date | Oct 23, 1984 |
| Priority date | — |
| Expiry date | Sep 2, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/69
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An automatic residual line suppression system for use with a spread spectrum signal wherein a narrow-band sample of the signal around a selected frequency is multiplied by a dithered signal in an auto-balance control loop. A resulting signal is used to control the dc offset of a mixer in order to minimize the residual carrier line in the signal spectrum while any remaining detectible residual lines are smeared by a noise source during up-conversion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.