Data transmission system with reduced error propagation
US5353310A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1992 |
| Grant date | Oct 4, 1994 |
| Priority date | — |
| Expiry date | Nov 4, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/03343
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
For avoiding error propagation as a result of decision feedback equalization, the data to be transmitted are coded with a coder 2 which has a transfer function substantially inverse to the transfer function of the channel 4. Consequently, instantaneous decisions about the received symbol may be made at the receiver 6 without intersymbol interference causing a disturbance. If the channel transfer function differs from the transfer function of the precoder 2, intersymbol interference will again occur, so that the symbol error rate will increase. In order to restrict this increase of the symbol error rate as much as possible, the receiver comprises a cascaded circuit of an adaptive filter 18 which has an inverse transfer function to that of the channel and a decoder 21 which has an inverse transfer function to that of the precoder 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.