Method for channel adaptive detecting/equalize
US5195106A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1990 |
| Grant date | Mar 16, 1993 |
| Priority date | — |
| Expiry date | Nov 14, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/005
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a communications device, two coherent detection algorithms (102 and 103), one of which has a decision feedback equalizer (103), and a detector selection algorithm (104) are used to dynamically select a detector depending on whether delay spread distortion is present. First the correlation of the detector without the equalizer (102) is measured. If this correlation is greater than a predetermined threshold, the data from that detector (102) is used by the communications device. If the correlation is less than the threshold, the correlation of the detector with the equalizer (103) is measured. If this is less than the correlation of the detector without the equalizer (102), the data from the detector without the equalizer (102) is used, otherwise the data is taken from the equalizer (103).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.