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An interference immunity decoding method for multicarrier trellis-coded SFH/16QAM.

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Název: An interference immunity decoding method for multicarrier trellis-coded SFH/16QAM.
Autoři: Shinoi, Ken-ichiro1, Saba, Takahiko2, Sasase, Iwao1
Zdroj: Electronics & Communications in Japan, Part 1: Communications. Nov1999, Vol. 82 Issue 11, p8-18. 11p.
Témata: *RADIO transmitter fading, *MOBILE communication systems, *TELECOMMUNICATION systems, *ORAL communication, *RADIO interference, *SIGNAL processing
Abstrakt: Multicarrier trellis-coded modulation is known to be effective in land mobile delay-sensitive speech communications, since it can achieve frequency diversity by multicarrier and trellis coding without interleaving. Recently, multicarrier trellis-coded 8PSK using frequency hopping (FH) has been proposed to reduce the fading correlation of the received signal and increase the error correction capability of multicarrier trellis-coded systems. In cellular communication systems, frequency reuse is employed to achieve good spectral efficiency, although it depends on the level of the cochannel interference (CCI). Interference immunity decoding methods with interleaving based on randomizing the CCI levels and adjusting the minimum Euclidean distance according to the weighted value by using the estimated CCI level per symbol have been proposed. However, the use of interleaving may cause time delays. In this paper, we propose an interference immunity decoding method for multicarrier trellis-coded slow-FH/16QAM without using interleaving. In our proposed scheme, we estimate the CCI using space symbols inserted in several slots and modify the branch metric according to the weighted value by using the estimated CCI level per symbol. Multiple carriers using frequency hopping are employed to prevent excess time delay by randomizing the interference level without interleaving. The BER performance of the proposed decoding method is investigated by computer simulation. It is shown that the proposed decoding method is effective in suppressing the effects of CCI in fading channels. © 1999 Scripta Technica, Electron Comm Jpn Pt 1, 82(11): 8–18, 1999 [ABSTRACT FROM AUTHOR]
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  Label: Title
  Group: Ti
  Data: An interference immunity decoding method for multicarrier trellis-coded SFH/16QAM.
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  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Shinoi%2C+Ken-ichiro%22">Shinoi, Ken-ichiro</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Saba%2C+Takahiko%22">Saba, Takahiko</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Sasase%2C+Iwao%22">Sasase, Iwao</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>. Nov1999, Vol. 82 Issue 11, p8-18. 11p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22RADIO+transmitter+fading%22">RADIO transmitter fading</searchLink><br />*<searchLink fieldCode="DE" term="%22MOBILE+communication+systems%22">MOBILE communication systems</searchLink><br />*<searchLink fieldCode="DE" term="%22TELECOMMUNICATION+systems%22">TELECOMMUNICATION systems</searchLink><br />*<searchLink fieldCode="DE" term="%22ORAL+communication%22">ORAL communication</searchLink><br />*<searchLink fieldCode="DE" term="%22RADIO+interference%22">RADIO interference</searchLink><br />*<searchLink fieldCode="DE" term="%22SIGNAL+processing%22">SIGNAL processing</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Multicarrier trellis-coded modulation is known to be effective in land mobile delay-sensitive speech communications, since it can achieve frequency diversity by multicarrier and trellis coding without interleaving. Recently, multicarrier trellis-coded 8PSK using frequency hopping (FH) has been proposed to reduce the fading correlation of the received signal and increase the error correction capability of multicarrier trellis-coded systems. In cellular communication systems, frequency reuse is employed to achieve good spectral efficiency, although it depends on the level of the cochannel interference (CCI). Interference immunity decoding methods with interleaving based on randomizing the CCI levels and adjusting the minimum Euclidean distance according to the weighted value by using the estimated CCI level per symbol have been proposed. However, the use of interleaving may cause time delays. In this paper, we propose an interference immunity decoding method for multicarrier trellis-coded slow-FH/16QAM without using interleaving. In our proposed scheme, we estimate the CCI using space symbols inserted in several slots and modify the branch metric according to the weighted value by using the estimated CCI level per symbol. Multiple carriers using frequency hopping are employed to prevent excess time delay by randomizing the interference level without interleaving. The BER performance of the proposed decoding method is investigated by computer simulation. It is shown that the proposed decoding method is effective in suppressing the effects of CCI in fading channels. © 1999 Scripta Technica, Electron Comm Jpn Pt 1, 82(11): 8–18, 1999 [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1002/(SICI)1520-6424(199911)82:11<8::AID-ECJA2>3.0.CO;2-N
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 11
        StartPage: 8
    Subjects:
      – SubjectFull: RADIO transmitter fading
        Type: general
      – SubjectFull: MOBILE communication systems
        Type: general
      – SubjectFull: TELECOMMUNICATION systems
        Type: general
      – SubjectFull: ORAL communication
        Type: general
      – SubjectFull: RADIO interference
        Type: general
      – SubjectFull: SIGNAL processing
        Type: general
    Titles:
      – TitleFull: An interference immunity decoding method for multicarrier trellis-coded SFH/16QAM.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Shinoi, Ken-ichiro
      – PersonEntity:
          Name:
            NameFull: Saba, Takahiko
      – PersonEntity:
          Name:
            NameFull: Sasase, Iwao
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 11
              Text: Nov1999
              Type: published
              Y: 1999
          Identifiers:
            – Type: issn-print
              Value: 87566621
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            – Type: volume
              Value: 82
            – Type: issue
              Value: 11
          Titles:
            – TitleFull: Electronics & Communications in Japan, Part 1: Communications
              Type: main
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