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Realization of simple decoders for high-coding-rate convolutional codes.

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Název: Realization of simple decoders for high-coding-rate convolutional codes.
Autoři: Kawazoe, Katsuhiko1, Kubota, Shuji1
Zdroj: Electronics & Communications in Japan, Part 1: Communications. Mar1998, Vol. 81 Issue 3, p47-56. 10p.
Témata: *DECODERS (Electronics), *COMPLEMENTARY metal oxide semiconductors, *CODING theory, *TELECOMMUNICATION satellites, *ELECTRONICS, *TELECOMMUNICATION systems
Abstrakt: This paper describes a method to configure pre-decoders for the high coding rate convolution codes needed when the SST method is used, thus enabling low power consumption in a Viterbi decoder. The proposed pre-decoders have no correcting capability, but do allow decoding of convolution codes with a minimum of hardware. The configuration method is studied here for general convolution codes with a constraint length K and a coding rate n/m. A specific circuit configuration for a pre-decoder is presented for the commonly used, punctured type, high coding rate convolution codes with coding rates ¾ to 7/8 and 15/16. The use of the SST method is now possible for high coding rate codes. The gate operates with a coding rate of 7/8 and an error rate after decoding of 10-4 that is 40% of that in the conventional type. Hence, a low power consumption Viterbi decoder is possible. As an example of the proposed high coding rate pre-decoder, a high-speed transmission error rate estimation circuit is proposed and its characteristics are obtained. © 1998 Scripta Technica. Electron Comm Jpn Pt. 1, 81(3): 47–56, 1998 [ABSTRACT FROM AUTHOR]
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  Label: Title
  Group: Ti
  Data: Realization of simple decoders for high-coding-rate convolutional codes.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Kawazoe%2C+Katsuhiko%22">Kawazoe, Katsuhiko</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kubota%2C+Shuji%22">Kubota, Shuji</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Electronics+%26+Communications+in+Japan%2C+Part+1%3A+Communications%22">Electronics & Communications in Japan, Part 1: Communications</searchLink>. Mar1998, Vol. 81 Issue 3, p47-56. 10p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22DECODERS+%28Electronics%29%22">DECODERS (Electronics)</searchLink><br />*<searchLink fieldCode="DE" term="%22COMPLEMENTARY+metal+oxide+semiconductors%22">COMPLEMENTARY metal oxide semiconductors</searchLink><br />*<searchLink fieldCode="DE" term="%22CODING+theory%22">CODING theory</searchLink><br />*<searchLink fieldCode="DE" term="%22TELECOMMUNICATION+satellites%22">TELECOMMUNICATION satellites</searchLink><br />*<searchLink fieldCode="DE" term="%22ELECTRONICS%22">ELECTRONICS</searchLink><br />*<searchLink fieldCode="DE" term="%22TELECOMMUNICATION+systems%22">TELECOMMUNICATION systems</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This paper describes a method to configure pre-decoders for the high coding rate convolution codes needed when the SST method is used, thus enabling low power consumption in a Viterbi decoder. The proposed pre-decoders have no correcting capability, but do allow decoding of convolution codes with a minimum of hardware. The configuration method is studied here for general convolution codes with a constraint length K and a coding rate n/m. A specific circuit configuration for a pre-decoder is presented for the commonly used, punctured type, high coding rate convolution codes with coding rates ¾ to 7/8 and 15/16. The use of the SST method is now possible for high coding rate codes. The gate operates with a coding rate of 7/8 and an error rate after decoding of 10-4 that is 40% of that in the conventional type. Hence, a low power consumption Viterbi decoder is possible. As an example of the proposed high coding rate pre-decoder, a high-speed transmission error rate estimation circuit is proposed and its characteristics are obtained. © 1998 Scripta Technica. Electron Comm Jpn Pt. 1, 81(3): 47–56, 1998 [ABSTRACT FROM AUTHOR]
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    Identifiers:
      – Type: doi
        Value: 10.1002/(SICI)1520-6424(199803)81:3<47::AID-ECJA5>3.0.CO;2-5
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      – Code: eng
        Text: English
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        PageCount: 10
        StartPage: 47
    Subjects:
      – SubjectFull: DECODERS (Electronics)
        Type: general
      – SubjectFull: COMPLEMENTARY metal oxide semiconductors
        Type: general
      – SubjectFull: CODING theory
        Type: general
      – SubjectFull: TELECOMMUNICATION satellites
        Type: general
      – SubjectFull: ELECTRONICS
        Type: general
      – SubjectFull: TELECOMMUNICATION systems
        Type: general
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      – TitleFull: Realization of simple decoders for high-coding-rate convolutional codes.
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          Name:
            NameFull: Kawazoe, Katsuhiko
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            NameFull: Kubota, Shuji
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            – D: 01
              M: 03
              Text: Mar1998
              Type: published
              Y: 1998
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              Value: 81
            – Type: issue
              Value: 3
          Titles:
            – TitleFull: Electronics & Communications in Japan, Part 1: Communications
              Type: main
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