GEN04-1: Cancellation of MR Head Asymmetry in Magnetic Tape Storage Systems

Olcer, S., Hutchins, R.A.

GLOBECOM 2006 - 2006 IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE（2006）

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摘要

This paper describes a fully digital approach for pulse-asymmetry estimation and cancellation in magnetic tape storage systems that employ magneto-resistive (MR) read heads. Algorithms are presented for decision-aided and non-decision- aided estimation of pulse asymmetry. The cancellation of asymmetry is based on a quadratic model of the MR head non- linearity. Using read-back waveforms obtained from commercial tape drives, it is shown that a significant improvement in read-channel performance is achieved by the techniques described. Asymmetry estimation and cancellation using a specific pattern defined in the linear tape open (LTO) tape format are also addressed.

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关键词

magnetic heads,magnetic tape storage,magnetoresistive devices,LTO,MR head asymmetry cancellation,linear tape open tape format,magnetic tape storage systems,magneto-resistive read heads,pulse-asymmetry estimation,read-channel performance,tape drives,

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