Circuit and method for improving phase detection
US9491017B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 2015 |
| Grant date | Nov 8, 2016 |
| Priority date | — |
| Expiry date | Sep 9, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/18
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A circuit comprises a decision unit configured to obtain a plurality of decision errors based on a demodulated signal and an original symbol; a calculator configured to calculate an instant direct current error based on the plurality of the decision errors, and first and second variance error signals based on the instant direct current error; an error detector configured to obtain a first result by determining whether an absolute value of both the first variance error signal and an the second variance error signal are larger than a first threshold; obtain a second result by determining whether an absolute value of a first decision error of the plurality of the decision error is larger than a second threshold; and output a second closest constellation point as a corrected symbol corresponding to the first decision error at least based on the first result and the second result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.