Device and method for automatically controlling decision points
US5896392A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1997 |
| Grant date | Apr 20, 1999 |
| Priority date | — |
| Expiry date | Jun 19, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/063
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An automatic decision-point control type decision circuit has a main decision unit, a sub-decision unit, an exclusive-OR circuit, and a controller. The main decision unit receives a data signal and one of two branched signals while the sub-decision unit receives the data signal and the other of the two branched signals. The two branched signals is obtained by branching a clock signal extracted from the data signal. The exclusive-OR circuit detects the difference between the output signal from the main decision unit and the output from the sub-decision unit. The controller calculates a bit error rate. In order to set the initial value of the decision point of the main decision unit, the controller detects a bit error rate by scanning the difference between the decision point of the main decision unit and the decision point of the sub-decision unit only at the beginning of its operation, and calculates an optimum decision point based on the relationship between the decision points and the bit error rate. Next, to control the decision point of the main decision unit, an optimum decision point is controlled based on the relationship between the bit error rate and a bit error rate detec…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.