Title :
Estimation of track misregistration by using dual-stripe magnetoresistive heads
Author :
He, Lian Na ; Wang, Zhi Gang ; Liu, Bin ; Mapps, Desmond J. ; Robinson, P. ; Clegg, Warwick W ; Wilton, D.T. ; Nakamura, Yoshihisa
Author_Institution :
Centre for Res. in Inf. Storage Technol., Plymouth Univ., UK
fDate :
7/1/1998 12:00:00 AM
Abstract :
We propose here a new concept of servoing with dual-stripe magnetoresistive (DSMR) heads. This paper examines the use of its asymmetric microtrack profile for estimating the data and providing servo information. The misregistration estimation algorithm is addressed for a class 4 partial response (PR4) equalized data channel. This requires a low-pass filter to reach an accurate estimation after enough samples are used. Simulation results for a specific head configuration are given which verify the estimating performance. The estimator estimates track misregistration precisely and quickly enough for practical purposes in a real storage system
Keywords :
low-pass filters; magnetic heads; magnetoresistive devices; partial response channels; servomechanisms; asymmetric microtrack profile; class 4 partial response equalized data channel; dual-stripe magnetoresistive head; low-pass filter; servo information; simulation; storage system; track misregistration estimation algorithm; Government; Helium; Low pass filters; Magnetic heads; Magnetic separation; Magnetic shielding; Magnetoresistance; Memory; Permanent magnets; Servomechanisms;
Journal_Title :
Magnetics, IEEE Transactions on
