An application of OFDM method to optical disc recording

Ryuichi Katayama, Yuzuru Takashima, Kimihiro Saito

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

An application of Orthogonal Frequency Division Multiplexing (OFDM) method to optical disc recording/readout is presented. OFDM has been widely used in the field of telecommunication owing to its highly efficient frequency usage. However OFDM has not been applied to optical disc recording because it is a multiple data transfer method and needs to record analog signals. Partial Response Maximum Likelihood (PRML) used in the current optical disc systems requires a certain kind of analog recording. Although optical recording usually creates binary marks, it is possible to obtain arbitrary analog readout signals by using PWM method. Another technique to generate analog signals using the oversampled binary recording is described and applied to multiple level recording. In addition, it is found that the level adjustment of multiple carriers for OFDM leads to the advantage when it is applied to the optical disc system. Using the simple transfer function model of the optical disc system, two types of readout signals using PRML and OFDM are calculated and then their qualities are compared. Since Quadrature Amplitude Modulation (QAM) method can be combined with OFDM, it is possible to increase the recoding density of optical disc systems. A method employing OFDM with 64-QAM and the pre-enhance method to the high frequency carrier shows an ability of 1.5 times recording density of the conventional Bru-ray Disc (BD).

Original languageEnglish (US)
Title of host publicationOptical Data Storage 2017
Subtitle of host publicationFrom New Materials to New Systems
PublisherSPIE
Volume10384
ISBN (Electronic)9781510612259
DOIs
StatePublished - Jan 1 2017
EventOptical Data Storage 2017: From New Materials to New Systems, ODS 2017 - San Diego, United States
Duration: Aug 6 2017 → …

Other

OtherOptical Data Storage 2017: From New Materials to New Systems, ODS 2017
CountryUnited States
CitySan Diego
Period8/6/17 → …

Keywords

  • Blue-ray disc(BD)
  • Constellation map
  • Optical Disc
  • Orthogonal Frequency Division Multiplexing
  • Oversampling
  • Quadrature Amplitude Modulation(QAM)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Katayama, R., Takashima, Y., & Saito, K. (2017). An application of OFDM method to optical disc recording. In Optical Data Storage 2017: From New Materials to New Systems (Vol. 10384). [103840I] SPIE. https://doi.org/10.1117/12.2272738