Phase detection method and apparatus for clock recovery
US9264214B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2013 |
| Grant date | Feb 16, 2016 |
| Priority date | — |
| Expiry date | Nov 2, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/66
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Embodiments of the present invention provide a phase detection method and apparatus. The apparatus comprises a phase detector, the phase detector comprising a calculation unit configured to calculate a phase difference according to a product of receiving power at different moments, so as to perform clock recovery by using the phase difference; wherein the receiving power is that obtained in sampling input signals at a predefined sampling rate, the predefined sampling rate being 2 times of a symbol rate. With the method and apparatus of the embodiments of the present invention, the problem that in case of a relatively large frequency difference or line width, or the transmitted signals are Nyquist signals of spectral widths close to the symbol rate, a conventional phase detection method will be invalid, is solved by calculating a phase difference only according to a product of receiving power at different moments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.