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Dive into the research topics where Lisa Fredrickson is active.

Publication


Featured researches published by Lisa Fredrickson.


ieee international magnetics conference | 1997

Digital Servo Processing In The Venus PRML Read / Write Channel

Lisa Fredrickson; D. Stone; L. Volz; G. Betti; P. Gadducci; F. Heydari; E. Marconetti; G. Maguire; D. Reddy

A digital servo processing system within the Venus PRML read/write channel is described. The processor provides for closed loop DC offset and gain control, robust digital peak detection, and integration of up to six servo bursts. Incorporated features optimize performance with asymmetric MR heads.


ieee international magnetics conference | 1997

Trellis Coding In The Venus PRML Read /Write Channel

Lisa Fredrickson; Giorgio Betti; Marcus Marrow; Gerry Maguire; Peter Gillen

A PRML read channel with a standard rate 8/9 code and a rate 4/5 trellis code is described. The code parameters are discussed, and simulated and measured performances are compared.


Archive | 1998

Frame synchronization for viterbi detector

Lisa Fredrickson


Archive | 1995

Rate 4/5 trellis code for PR4 channels with improved error propagation

Lisa Fredrickson


Archive | 1998

Signal error-correction system and method

Lisa Fredrickson; Reza M. Dehmohseni


Archive | 1996

Matched spectral null encoder/decoder

Lisa Fredrickson


Archive | 1997

Phase detector estimator

Lisa Fredrickson; Vladimir Kovner; Dennis W. Hogg


Archive | 1997

Method and apparatus for a digital peak detection system including a countdown timer

Lisa Fredrickson; Dennis Carl Stone; Leroy Allen Volz


Archive | 1999

Method and apparatus for generating code words with shifted tribit error protection

Lisa Fredrickson; Anuradha Sukhija


Archive | 1999

Amplifier gain control method using conditional updating

Lisa Fredrickson; Dennis Carl Stone; Leroy Allen Volz

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Marcus Marrow

University of California

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