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Estimation of track misregistration by using dual-stripe magnetoresistive heads

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8 Author(s)
Lian Na He ; Centre for Res. in Inf. Storage Technol., Plymouth Univ., UK ; Zhi Gang Wang ; Bin Liu ; Mapps, D.J.
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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

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Magnetics, IEEE Transactions on  (Volume:34 ,  Issue: 4 )