Method and system for removing signal defects in MR head signals
US7545594B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 26, 2006 |
| Grant date | Jun 9, 2009 |
| Priority date | — |
| Expiry date | Jul 7, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0016
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The disclosure describes a data storage system that includes a signal defect correction system for removing signal defects in magnetoresistive head playback signals. The signal defect correction system utilizes a matched finite impulse response (FIR) filter and digital signal processing algorithms. The matched FIR filter is designed with an impulse response that is the time reversed, complex conjugate of a signal defect model. The signal defect model is generated from a number of sample playback signals. The matched FIR filter is applied to the playback signal and digital signal processing techniques are applied to the filter response to detect a signal defect in the playback signal and estimate the amplitude and location of the signal defect. The signal defect model is retrieved from memory and applied to the playback signal using the amplitude and location estimates to substantially remove the signal defect from the playback signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.