Comparison of timing recovery schemes for optical storage systems

Yifei Yuan; Bhagavatula Vijaya Kumar

doi:10.1117/12.997644

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28 June 1999 Comparison of timing recovery schemes for optical storage systems

Yifei Yuan, Bhagavatula Vijaya Kumar

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Proceedings Volume 3864, Joint International Symposium on Optical Memory and Optical Data Storage 1999; 38642D (1999) https://doi.org/10.1117/12.997644
Event: Optical Data Storage, 1999, Kauai, HI, United States

Abstract

Timing recovery (also called bit synchronization) is indispensable for the signal processing in recording systems. As readback signals always suffer from unknown time-varying delays due to mechanical disturbances, timing recovery is needed to keep track of those delays and provide correct time instants for sampling and bit detection. Timing recovery is usually implemented with a phase-locked loop containing a timing error detector (TED), a loop filter and a voltage control oscillator (VCO). Three timing schemes can be seen in data storage channels. Among them, binary logic method dominates optical storage systems such as CD-ROM and DVD-ROM. It is comparatively simple, but degrades in high intersymbol interference (ISI) situations.

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Yifei Yuan and Bhagavatula Vijaya Kumar "Comparison of timing recovery schemes for optical storage systems", Proc. SPIE 3864, Joint International Symposium on Optical Memory and Optical Data Storage 1999, 38642D (28 June 1999); https://doi.org/10.1117/12.997644

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