Process and installation for the analysis and retrieval of a sampling and interpolation signal
US4689759A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1984 |
| Grant date | Aug 25, 1987 |
| Priority date | — |
| Expiry date | Jul 6, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B14/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
To analyze and restore an analog signal by sampling at a frequency between 2.5 and five times the band of the signal and by interpolation, the signals sampled at the rate (F.sub.e) is subjected to low pass filtering for isolating the signal band B, then to an interpolation in several steps each leading to multiplication of the samples by inserting zeros between the available samples and by subjecting the new set of samples obtained to digital low pass filtering. The installation for this may comprise an input filter, an A/D converter and an interpolater. The filter isolates the band of the signal then the interpolater operates in several steps each leading to multiplication of the samples by inserting zeros between the available samples and by subjecting the new set of samples obtained to digital low pass filtering.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.