Signal correction using soft information in a data channel
US11716097B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2021 |
| Grant date | Aug 1, 2023 |
| Priority date | — |
| Expiry date | Dec 29, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/3972
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Example systems, read channel circuits, data storage devices, and methods to provide signal correction based on soft information in a read channel are described. The read channel circuit includes a soft output detector, such as a soft output Viterbi algorithm (SOVA) detector, and a signal correction circuit. The soft output detector passes detected data bits and corresponding soft information to the signal correction circuit. The signal correction circuit uses the soft information to determine a signal correction value, which is combined with input signal to return a corrected signal to the soft output detector for a next iteration. In some configurations, the signal correction value may compensate for DC offset, AC coupling poles, and/or signal asymmetries to reduce baseline wander in the read channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.