Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
권호 표지

A PRML System for High Density Optical Recording

고밀도 광기록 채널을 위한 PRML 시스템의 설계 및 성능 분석

  • 조한규 (연세대학교 전기컴퓨터 공학과) ;
  • 안성근 (LG 전자 주식회사 디지털 미디어 연구소) ;
  • 김진용 (LG 전자 주식회사 디지털 미디어 연구소) ;
  • 강창언 (연세대학교 전기컴퓨터 공학과) ;
  • 홍대식 (연세대학교 전기컴퓨터 공학과)
  • Published : 2000.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

This paper deals with methods for partial response maximum-likelihood (PRML) detection and crosstalk cancellation. In accrodance with the demand for increased recording density, 20 gigabyte (Gbyte) digital versatile disk (DVD) ROM channel is considered. Channel is modelled to be close to real optical channel using DIFFRACT$\^$TM/. After comparing the spectral characteristics of various PR polynomials, P(D)=1＋D＋D$^2$＋D$^3$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. The experimental results show that crosstalk and nonlinear distortions degrade performance by about 2dB, respectively. We also show that when radial tilt is added to the crosstalk, the performance degradation assumes quite significant proprotions.

Keywords