Phase detector, timing recovery device using the same, and a demodulator using the timing recovery device
US6415004B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1999 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | Jul 30, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/042
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In the present invention, the amplitude subtracting type of phase detector of the timing recovery section outputs a difference &ggr;i of a synthesized amplitude deviation at ½ of a symbol time. The averaging section computes an average value of this difference &ggr;i and outputs a phase control signal Vi corresponding to the average value to the phase controller. The phase controller controls a timing phase of the sampling clock according to this phase control signal Vi. Dichotomizer generates a recovered symbol clock by dichotomizing the sampling clock that has been timing phase controlled. Removal of DC offset from and demodulation of the sampled baseband signal is executed in parallel to the above processing using the recovered symbol clock with the Nyquist data extracting section, the offset detector, the offset correcting section, and the data determining section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.