Multi-level digital data regeneration system
US5295155A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1992 |
| Grant date | Mar 15, 1994 |
| Priority date | — |
| Expiry date | Oct 30, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/066
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An adaptive regeneration system is provided for reconstructing a signal received in the form of a multi-level composite data and clock signal which has been degraded with respect to amplitude and timing. The system includes a local clock circuit for outputting a plurality of phase-delayed local clock signals, and a clock recovery circuit for receiving the received multi-level signal and the plurality of phase-delayed clock signals and extracting a phase-delayed local clock signal which most accurately represents the phase shift between the received multi-level signal and the local clock signal. A threshold level selection circuit receives the extracted phase-delayed local clock signal and the received multi-level signal and outputs in real time a data amplitude reading and a plurality of multi-level threshold levels corresponding to the amplitude levels of the received multi-level signal. A data regenerator receives the data amplitude reading, the plurality of multi-level threshold levels and the extracted phase-delayed signal and reconstructs and outputs the received multi-level signal essentially in its originally transmitted form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.