Method and apparatus for extracting reliability information from partial response channels
US6587987B1 · kind B1 · utility
13Cited by
6References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2000 |
| Grant date | Jul 1, 2003 |
| Priority date | — |
| Expiry date | Jun 16, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/47
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention is a method and system for generating soft outputs by taking advantage of the fact that, in PR channels, there exists a set of error event sequences that occurs more often than others. This results in a soft output extractor with significantly lower complexity than the prior art SOVA system. Minimum distance error event sequences are identified and soft information or bit reliabilities are extracted from the PR channel based on the identified sequences. The soft information is then used by an iterative error control decoder correct errors more efficiently.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.