Signal detection apparatus for detecting digital information from PCM signal
US5265125A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 14, 1991 |
| Grant date | Nov 23, 1993 |
| Priority date | — |
| Expiry date | Nov 14, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/497
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A signal detection apparatus detects original information from a PCM signal transmitted through a communication channel or reproduced from a recording medium. The apparatus includes: a first equalizer for equalizing the PCM signal so as to decrease intersymbol interference, a clock regenerator for regenerating a clock signal synchronized with a timing of the digital information from an output of the first equalizer; an amplitude detector for detecting an amplitude from the output of the first equalizer and the clock signal; a second equalizer for equalizing the output of the first equalizer to a partial-response equalized signal, and a detecting circuit for detecting the original digital information at a clock timing of the clock signal from the partial-response equalized signal. Accordingly, without being influenced by the amplitude fluctuations of the signal, the original digital information can be detected at a low bit error rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.