Signal detection apparatus for detecting digital information from a PCM signal
US5166955A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 26, 1990 |
| Grant date | Nov 24, 1992 |
| Priority date | — |
| Expiry date | Nov 26, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/497
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A signal detection apparatus detects digital information contained in a binary baseband PCM signal transmitted on a communication transmission channel or recorded on a recording medium. A first equalizer equalizes the PCM signal to reduce intersymbol interference. A clock reproducer reproduces a clock signal synchronized with the timing of the digital information using an output signal of the first equalizer. A second equalizer subjects the output signal of the first equalizer to partial response equalization. A decoding circuit decodes the digital information from an output signal of the second equalizer at a timing of the clock signal. A stable clock signal is easily reproduced and the digital information is detected at a lower bit error rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.