Frame Synchronization for PPM-Encoded Longitudinal Position Words in Magnetic Tape Storage

Author

Cherubini, Giovanni ; Cideciyan, Roy D. ; Eleftheriou, Evangelos ; Jelitto, Jens

Author_Institution

IBM Res. - Zurich, Ruschlikon, Switzerland

fYear

2009

Firstpage

1

Lastpage

6

Abstract

Frame synchronization is studied for pulse-position modulation-encoded longitudinal position (LPOS) words that are embedded in servo patterns written on tape. After introducing soft-output detection of LPOS symbols, the problem of LPOS frame synchronization using soft outputs from the LPOS detector is considered. An efficient LPOS frame-synchronization algorithm that is robust in the presence of transition noise found in magnetic recording channels is then proposed. Finally, the performance of hard-decision LPOS frame synchronization is compared by simulations with that of the proposed soft-decision algorithm, and a hardware implementation of the overall scheme is illustrated.

Keywords

magnetic tape storage; pulse position modulation; synchronisation; LPOS frame-synchronization algorithm; PPM-encoded longitudinal position words; frame synchronization; hardware implementation; magnetic tape storage; pulse-position modulation-encoded longitudinal position; servo patterns; soft-decision algorithm; Additive white noise; Detectors; Gaussian noise; Hardware; Magnetic heads; Magnetic noise; Magnetic recording; Pulse modulation; Servomechanisms; Signal generators;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2009. GLOBECOM 2009. IEEE

Conference_Location

Honolulu, HI

ISSN

1930-529X

Print_ISBN

978-1-4244-4148-8

Type

conf

DOI

10.1109/GLOCOM.2009.5425625

Filename

5425625