• 제목/요약/키워드: high density recording

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Signal Processing for Perpendicular Recording Systems

  • Lee, Jun;Woo, Choong-Chae
    • 전기전자학회논문지
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    • 제15권1호
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    • pp.70-75
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    • 2011

  • Longitudinal recording has been the cornerstone of all two generations of magnetic recording systems, FDD and HDD. In recent, perpendicular recording has received much attention as promising technology for future high-density recording system Research into signal processing techniques is paramount for the issued storage system and is indispensable like longitudinal recording systems. This paper focuses on the performance evaluation of the various detectors under perpendicular recording system. Parameters for improving the their performance are examined for some detectors. Detectors considered in this work are the partial response maximum likelihood (PRML), noise-predictive maximum likelihood (NPML), fixed delay tree search with decision feedback (FDTS/DF), dual decision feedback equalizer (DDFE) and multilevel decision feedback equalizer (MDFE). Their performances are analyzed in terms of mean squared error (MSE) and noise power spectra, and similarity between recording channel and partial response (PR) channel.

  • https://doi.org/10.7471/ikeee.2011.15.1.070 인용 PDF KSCI

고밀도 광 기록 채널에서 LDPC 부호의 연판정 출력 알고리즘별 성능비교 (Performance Comparison of LDPC codes with Different Soft-output Algorithm for High Density Optical Recording Channel)

  • 이봉일;이재진
    • 대한전자공학회:학술대회논문집
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    • 대한전자공학회 2008년도 하계종합학술대회
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    • pp.891-892
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    • 2008

  • 본 논문에서는 최근 주목받고 있는 에러 정정 기법 중 하나인 LDPC(Low Density Parity Check) 부호를 광 기록 채널(Optical Recording Channel)에 적용해 보았고 이때 사용되는 연판정 출력 알고리즘으로 MAP과 SOVA를 이용하여 성능을 비교하였다.

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