System and method for reducing error propagation in a decision feedback equalizer of ATSC VSB receiver
US6734920B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2001 |
| Grant date | May 11, 2004 |
| Priority date | — |
| Expiry date | Aug 1, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/0349
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
For use in a receiver capable of decoding trellis encoded signals, there is disclosed an apparatus and method for reducing error propagation in a decision feedback equalizer. The apparatus of the invention comprises a trellis decoder and a decision feedback equalizer coupled to the path memory outputs of the trellis decoder. The decision feedback equalizer is capable of obtaining symbol values from the trellis decoder and using the symbol values as estimates in channel equalization. In one embodiment of the invention, a first equalizer and trellis decoder combination is used to estimate a symbol stream. Then a second equalizer and trellis decoder combination is used to further minimize error by operating on the output of the first equalizer and trellis decoder combination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.