ITE Technical Report
Online ISSN : 2424-1970
Print ISSN : 1342-6893
ISSN-L : 1342-6893
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23.38
Displaying 1-7 of 7 articles from this issue
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  • [title in Japanese]
    Article type: Cover
    Pages Cover1-
    Published: June 11, 1999
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.23.38.0_Cover1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • [title in Japanese]
    Article type: Index
    Pages Toc1-
    Published: June 11, 1999
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.23.38.0_Toc1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • Development of 32/33(0, 10/10)Code used Simple Coding Rule
    Saburo TAZAKI, Naoto HARA, Sinji TSUZUKI
    Article type: Article
    Session ID: VIR99-64
    Published: June 11, 1999
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.23.38.0_1
    CONFERENCE PROCEEDINGS FREE ACCESS
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    One of ceaseless requirements toward recording code is the improvement on the coding rate, η=m/n, where m and are dataword and codeword lengths, respectively, However, design problems accompany with these trends such that the longer m and n, the more complicate coding rules and coding/decoding circuit structures. In this paper, we solve them by developing a new design method in which every datawords are firstly divided more than three subdatawords and the coding ruls is constructed with suitably combining those. As the examples of this method, we design 32/33(0, 10/10)code.
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  • A Study of PRML Systems for Double-layered Perpendicular Magnetic Recording Medium
    Hisashi Osawa, Hiroyuki Sumiyoshi, Yoshihiro Okamoto, Hidetoshi Saito, ...
    Article type: Article
    Session ID: VIR99-65
    Published: June 11, 1999
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.23.38.0_7
    CONFERENCE PROCEEDINGS FREE ACCESS
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    As a PRML system for perpendicular magnetic recording using a double-layered medium and an MR head, a new PR(1, 2, 3, 3, 2, 1)ML system is proposed. The relationship between the required SNR to achieve a bit error rate of 10^-4 and a normalized linear density for(1, 7)RLL and 16/17(0, 6/6)recording codes is obtained by computer simulation and it is compared with those of conventional PRML systems. The results show that among these PRML systems the conventional(1, 7)RLL coded PR(1, 2, 3, 2, 1)ML systems shows the best performance in relatively low density recording while the(1, 7)RLL coded PR(1, 2, 3, 3, 2, 1)ML system has the best performance in high density recoding.
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  • Error Rate Performance of PRML Systems for Perpendicular Magnetic Recording using Single-layered Medium
    Yoshihiro Okamoto, Manabu Akamatsu, Toshikazu Kanaoka, Tomo Kishigami, ...
    Article type: Article
    Session ID: VIR99-66
    Published: June 11, 1999
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.23.38.0_15
    CONFERENCE PROCEEDINGS FREE ACCESS
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    Bit error rate performance of PRML systems for the perpendicular magnetic recording using single-layer medium is studied. Error rates of both(1, 7)RLL coded PRML systems and 16/17(0, 6/6)coded PRML systems are estimated by recording and reproducing experiments using a spinstand with a single-layered medium and compared with those of a longitudinal medium. The results show that 16/17(0, 6/6)coded E^2PR4ML system in perpendicular magnetic recording using the single-layered medium has a excellent performance among those systems.
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  • Turbo Coded PRML Systems Using Two-track Recording
    Hidetoshi SAITO, Masaichi TAKAI, Yoshihiro OKAMOTO, Hisashi OSAWA
    Article type: Article
    Session ID: VIR99-67
    Published: June 11, 1999
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.23.38.0_23
    CONFERENCE PROCEEDINGS FREE ACCESS
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    Recently, turbo coding is known as an effective one of error control coding in various digital communication systems. In this report, the system of the turbo coding and PRML is studied by using two-track recording method. The bit-error rate performances of coding rtate 4/6, 8/10 and 16/18 turbo coded PR4ML systems are obtained by computer simulation in high density read/write magnetic recording system with partial erasure. As a result, it is shown that the coding rate 16/18 turbo coded system can provide an improvement of about 12.6dB over the conventional NRZ-coded system at a bit error rate of 10^-4 and a normalized linear density of 3.
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  • [title in Japanese]
    Article type: Appendix
    Pages App1-
    Published: June 11, 1999
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.23.38.0_App1
    CONFERENCE PROCEEDINGS FREE ACCESS
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