Variable threshold detection for 3D page-oriented optical data storage systems

Tawei Ho; Nopparit Intharasombat; Alexander A. Sawchuk

doi:10.1117/12.668418

20 January 2006 Variable threshold detection for 3D page-oriented optical data storage systems

Tawei Ho, Nopparit Intharasombat, Alexander A. Sawchuk

Proceedings Volume 6027, ICO20: Optical Information Processing; 60274L (2006) https://doi.org/10.1117/12.668418
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China

Abstract

We propose a new method to determine dynamically the threshold in volumetric (3D) page-oriented optical data storage (PODS) systems that use an incoherent (non-holographic) imaging format. In these systems, the inter-symbol interference (ISI) and inter-page interference (IPI) that occurs with very high data packing density are two major sources of error during data retrieval. Traditional readout systems based on a fixed binary decision threshold provide poor results. Our variable threshold detection method identifies the amount of interference from three dimensions for each data element (pixel) and adjusts the threshold value based on that information. In simulation results, the variable threshold method exhibits significant improvement over traditional detection methods.

Citation Download Citation

Tawei Ho, Nopparit Intharasombat, and Alexander A. Sawchuk "Variable threshold detection for 3D page-oriented optical data storage systems", Proc. SPIE 6027, ICO20: Optical Information Processing, 60274L (20 January 2006); https://doi.org/10.1117/12.668418

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available