Robust metric computation of longitudinal position (LPOS) data symbol detection
US8576510B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2011 |
| Grant date | Nov 5, 2013 |
| Priority date | — |
| Expiry date | Apr 27, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/956
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In one embodiment, a tape drive system includes a magnetic head having a servo sensor for sensing a defined servo track of a magnetic tape and configured to read servo pulses from servo bursts of the servo track while the magnetic tape is moving past the magnetic head with the servo bursts representing an encoded data symbol, an analog-to-digital converter configured to provide a sequence of samples of the readback servo signal, a digital correlator configured to compute a correlation signal between the sequence and a reference waveform, a timing reference module configured to provide a reference timing model having interpolation instants to the digital correlator, a correlation interpolator configured to interpolate the correlation signal at the interpolation instants and compute a longitudinal position (LPOS) detection metric, and an LPOS detector configured to decode the encoded data symbol of the servo bursts using the computed LPOS detection metric.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.