Dynamic magnetic information storage or retrieval – Monitoring or testing the progress of recording
Reexamination Certificate
2007-01-02
2007-01-02
Young, Wayne (Department: 2627)
Dynamic magnetic information storage or retrieval
Monitoring or testing the progress of recording
Reexamination Certificate
active
10945393
ABSTRACT:
A partial response maximum likelihood (PRML) data detecting in a magnetic recording storage device is carried out with a preliminary measuring of write-read channel responses to all nonzero binary combinations of a given length. Decoding of the user data is performed according to a Viterbi algorithm, where the previously measured responses are used as expected samples for branch metric calculations. The measurement of the write-read channel responses and the decoding of the user data are fulfilled by a self-adjusting PRML receiver that contains a controllable clock recovery, a responses accumulator and an adjustable Viterbi detector. The controllable clock recovery produces a set of read-back signal samples containing exactly one sample per bit with or without phase error correction. The responses accumulator calculates averaged responses of the write-read channel. The adjustable Viterbi detector reconstructs the user data that were written to the disk.
REFERENCES:
patent: 5341387 (1994-08-01), Nguyen
patent: 5440433 (1995-08-01), Yun
patent: 5493454 (1996-02-01), Ziperovich et al.
patent: 5583705 (1996-12-01), Ziperovich et al.
patent: 5588011 (1996-12-01), Riggle
patent: 5610776 (1997-03-01), Oh
patent: 5822689 (1998-10-01), Hwang
patent: 5889823 (1999-03-01), Agazzi et al.
patent: 5954837 (1999-09-01), Kim
patent: 5995544 (1999-11-01), Cherubini et al.
patent: 6201840 (2001-03-01), Rub et al.
patent: 6249398 (2001-06-01), Fisher et al.
patent: 6393598 (2002-05-01), Tsang et al.
patent: 6594094 (2003-07-01), Rae et al.
patent: 6600617 (2003-07-01), Zeng
patent: 6771570 (2004-08-01), Wong et al.
Stein Anatoli B.
Volfbeyn Semen P.
Guzik Technical Enterprises
Lappin Mark G.
Rodriquez Glenda P.
Young Wayne
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