Method and apparatus for evaluating performance of a read channel
US8046669B2 · kind B2 · utility
1Cited by
29References
10Claims
0Family size
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Key dates
| Filing date | Jan 14, 2011 |
| Grant date | Oct 25, 2011 |
| Priority date | — |
| Expiry date | Jan 14, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/4146
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus are provided for measuring the performance of a read channel. A number of detection techniques, such as SOVA and maximum-a-posteriori (MAP) detectors, produce a bit decision and a corresponding reliability value associated with the bit decision. The reliability value associated with the bit decision may be expressed, for example, in the form of log likelihood ratios (LLRs). The reliability value can be monitored and used as a performance measure. The present invention provides a channel performance measure that generally correlates directly to the BER but can be collected in less time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.