About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Publication
PACRIM 2009
Conference paper
Characterization and detection of PPM-encoded servo signals in tape drives
Abstract
Timing-based servo signals, which are read back from dedicated servo patterns on tape to generate estimates for the operation of reel-to-reel and track-follow servomechanisms, are characterized by a first-order position jitter noise and pulse-width variation noise model. A method for the identification of servo signal parameters and the evaluation of the relative contributions of additive noise and medium noise components is presented. The performance of matched-filter detection of binary symbols that are embedded in recorded servo patterns using pulse-position modulation is investigated, and an analytical expression for the symbol-error probability in the presence of additive noise and medium noise is obtained. Finally, the performance of a near-optimum detector approximating the matched filter is evaluated by simulations and compared with matched-filter detection performance. © 2009 IEEE.