Disk drive margining read channel by biasing log-likelihood ratios of an iterative decoder
US8589773B1 · kind B1 · utility
131Cited by
7References
22Claims
0Family size
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Key dates
| Filing date | Dec 18, 2009 |
| Grant date | Nov 19, 2013 |
| Priority date | — |
| Expiry date | Jul 13, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2020/1863
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of data tracks. A read signal emanating from the head is sampled to generate read samples, and first log-likelihood ratios (LLRs) are generated in response to the read samples. The first LLRs are biased to generate biased LLRs, and the biased LLRs are decoded into a data sequence, wherein the biased LLRs increase an error rate of the data sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.