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Optical Engineering

Partial response maximum-likelihood system and crosstalk cancellation method for high-density optical recording
Author(s): Hangyu Cho; Jonghoe An; Sunghwan Ong; Seong-Keun Ahn; Jin-Yong Kim; Daesik Hong
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Paper Abstract

Methods for partial response maximum-likelihood (PRML) detection and crosstalk cancellation are discussed. In accordance with the demand for increased recording density, a 20 Gbyte digital versatile disk (DVD) ROM channel is considered. The channel is modeled to be close to a real optical channel using DIFFRACTtm. After comparing the spectral characteristics of various PR polynomials, P(D) = 1 + D +D2 +D3 is proposed as a target PR. The performance of the system is illustrated under the condition that the readout signal is degraded by crosstalk, radial tilt, and nonlinear distortions in optics. Finally, we present the multispot detection technique for crosstalk cancellation. The simulation results show that if no radial tilt is present, crosstalk is fully cancelled.

Paper Details

Date Published: 1 August 2001
PDF: 8 pages
Opt. Eng. 40(8) doi: 10.1117/1.1386791
Published in: Optical Engineering Volume 40, Issue 8
Show Author Affiliations
Hangyu Cho, Yonsei Univ. (South Korea)
Jonghoe An, Yonsei Univ. (South Korea)
Sunghwan Ong, Yonsei Univ. (South Korea)
Seong-Keun Ahn, LG Electronics Inc. (South Korea)
Jin-Yong Kim, LG Electronics Inc. (South Korea)
Daesik Hong, Yonsei Univ. (South Korea)

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