Subsampled carrier recovery for high data rate demodulators
US5692014A · kind A · utility
21Cited by
33References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 3, 1995 |
| Grant date | Nov 25, 1997 |
| Priority date | — |
| Expiry date | Feb 3, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0334
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A high performance, low cost technique for carrier recovery and tracking of high rate demodulator (>200 Mbps to multi-gigabits per second) system is presented. The locally generated carrier is held in phase locked synchronism with the incoming modulated carrier through a carrier recovery scheme in which the modulated data is detected and subsampled using the bit synchronizing circuitry to provide a strobe signal for subsampling. The voltage levels of the subsampled data are analyzed to determine a phase error signal. The subsampled data are used to address a lookup table of error values stored in memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.