Global variance parameter based on mutual information in a data channel
US12373130B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 2023 |
| Grant date | Jul 29, 2025 |
| Priority date | — |
| Expiry date | Jul 19, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/3784
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Example systems, read channel circuits, data storage devices, and methods to use a global variance parameter based on mutual information to modify operation of a soft output detector in a read channel are described. The read channel circuit includes a soft output detector, such as a soft output Viterbi algorithm (SOVA) detector that includes variance terms. The variance terms are modified by a global variance parameter based on mutual information values. The soft output detector processes an input signal using the modified branch variance terms to determine data bits and corresponding soft information for decoding data in the read channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.