Apparatus and method for noise-predictive maximum likelihood detection
US6625235B1 · kind B1 · utility
45Cited by
5References
17Claims
0Family size
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Key dates
| Filing date | Nov 2, 1999 |
| Grant date | Sep 23, 2003 |
| Priority date | — |
| Expiry date | Nov 2, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10009
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a maximum likelihood sequence detector for symbol sequences which were equalized in a PR4 equalizer, noise prediction means (35) are provided including infinite impulse response (IIR) filtering, which have noise-whitening capabilities and are imbedded into the maximum likelihood detection process. The resulting INPML detector (10) can be implemented in digital or analog circuit technology. In addition, a DC-notch filter (44a) and a stochastic gradient procedure can be provided for DC offset compensation and for MR head or signal asymmetry compensation.
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