Method and apparatus for detecting data in magnetic recording using decision feedback

The present invention provides a method and apparatus for detecting data received from a magnetic storage channel (100) having a channel pulse response represented by a polynomial including intersymbol interference (ISI) terms. The detector (124) includes a Viterbi detector (124) corresponding to a...

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Bibliographische Detailangaben
Hauptverfasser:	BERNARDO RUB, HAMID R SHAFIEE
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRONIC CIRCUITRY CODE CONVERSION IN GENERAL CODING DECODING DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TOANOTHER ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER PHYSICS TRANSMISSION TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung:	The present invention provides a method and apparatus for detecting data received from a magnetic storage channel (100) having a channel pulse response represented by a polynomial including intersymbol interference (ISI) terms. The detector (124) includes a Viterbi detector (124) corresponding to a trellis structure (134) having states connected by branches having associated branch metrics. In one embodiment, the Viterbi detector (124) includes a branch metric calculator component (144) configured to calculate a branch metric associated with each of the plurality of branches by removing a contribution to the branch metric associated with a predetermined ISI term.