Adaptive carrier detection
US5260974A · kind A · utility
64Cited by
8References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 10, 1991 |
| Grant date | Nov 9, 1993 |
| Priority date | — |
| Expiry date | May 10, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2203/5495
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An improvement in an apparatus which uses a carrier detection threshold level for detecting a carrier signal modulated with binary data. The threshold level is dynamically changed and generally seeks a level above the background noise. The threshold level is maintained constant when the detected signal exceeds the threshold level. An evaluation circuit is able to examine the detected signal to determine whether it contains data or only noise, and if it contains only noise, a possible trapped condition is avoided by raising the threshold level to a level higher than the background noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.