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Direct Adaptive Multi-Resampling Turbo Equalizer for Underwater Acoustic Single-Carrier Communication.

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Title: Direct Adaptive Multi-Resampling Turbo Equalizer for Underwater Acoustic Single-Carrier Communication.
Authors: Lin, Zehua, Wang, Lei, Peng, Cong, Zhang, Shuhao
Source: Journal of Marine Science & Engineering; Aug2024, Vol. 12 Issue 8, p1271, 16p
Subject Terms: UNDERWATER acoustic communication, DOPPLER effect, SMART structures, ERROR rates, PROBLEM solving
Abstract: A wideband Doppler Effect is a significant challenge for underwater acoustic communications (UAC). This paper proposes a new two-stage structure of direct adaptive multi-resampling turbo equalizer (DAM-TEQ) for solving the problem of large timescale errors in time-varying channels, which uses an innovative adaptive time-domain resampling method for Doppler estimation and compensation. In this equalizer, the received signal is first fed into the first-stage structure, in which an adaptive resampling is performed using equalization coefficient detection to achieve a Doppler rough estimation. After the processing is completed, it is fed into the second-stage structure for joint equalization and decoding, effectively reducing the error of information transmission. Compared with the conventional turbo equalizer (TEQ) based on timescale estimation, the proposed equalizer can avoid the problem of the Doppler Effect not being accurately estimated in time-varying channels, with only a slight increase in complexity. Simulations and lake trails show that the equalizer can effectively perform a Doppler estimation and compensation in time-varying channels, and has a better bit error rate (BER) performance than the traditional timescale-based TEQ. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Marine Science & Engineering is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
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  Data: Direct Adaptive Multi-Resampling Turbo Equalizer for Underwater Acoustic Single-Carrier Communication.
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  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Lin%2C+Zehua%22">Lin, Zehua</searchLink><br /><searchLink fieldCode="AR" term="%22Wang%2C+Lei%22">Wang, Lei</searchLink><br /><searchLink fieldCode="AR" term="%22Peng%2C+Cong%22">Peng, Cong</searchLink><br /><searchLink fieldCode="AR" term="%22Zhang%2C+Shuhao%22">Zhang, Shuhao</searchLink>
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  Data: Journal of Marine Science & Engineering; Aug2024, Vol. 12 Issue 8, p1271, 16p
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  Data: <searchLink fieldCode="DE" term="%22UNDERWATER+acoustic+communication%22">UNDERWATER acoustic communication</searchLink><br /><searchLink fieldCode="DE" term="%22DOPPLER+effect%22">DOPPLER effect</searchLink><br /><searchLink fieldCode="DE" term="%22SMART+structures%22">SMART structures</searchLink><br /><searchLink fieldCode="DE" term="%22ERROR+rates%22">ERROR rates</searchLink><br /><searchLink fieldCode="DE" term="%22PROBLEM+solving%22">PROBLEM solving</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: A wideband Doppler Effect is a significant challenge for underwater acoustic communications (UAC). This paper proposes a new two-stage structure of direct adaptive multi-resampling turbo equalizer (DAM-TEQ) for solving the problem of large timescale errors in time-varying channels, which uses an innovative adaptive time-domain resampling method for Doppler estimation and compensation. In this equalizer, the received signal is first fed into the first-stage structure, in which an adaptive resampling is performed using equalization coefficient detection to achieve a Doppler rough estimation. After the processing is completed, it is fed into the second-stage structure for joint equalization and decoding, effectively reducing the error of information transmission. Compared with the conventional turbo equalizer (TEQ) based on timescale estimation, the proposed equalizer can avoid the problem of the Doppler Effect not being accurately estimated in time-varying channels, with only a slight increase in complexity. Simulations and lake trails show that the equalizer can effectively perform a Doppler estimation and compensation in time-varying channels, and has a better bit error rate (BER) performance than the traditional timescale-based TEQ. [ABSTRACT FROM AUTHOR]
– Name: Abstract
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Marine Science & Engineering is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.3390/jmse12081271
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 16
        StartPage: 1271
    Subjects:
      – SubjectFull: UNDERWATER acoustic communication
        Type: general
      – SubjectFull: DOPPLER effect
        Type: general
      – SubjectFull: SMART structures
        Type: general
      – SubjectFull: ERROR rates
        Type: general
      – SubjectFull: PROBLEM solving
        Type: general
    Titles:
      – TitleFull: Direct Adaptive Multi-Resampling Turbo Equalizer for Underwater Acoustic Single-Carrier Communication.
        Type: main
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          Name:
            NameFull: Lin, Zehua
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            NameFull: Wang, Lei
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            NameFull: Peng, Cong
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            NameFull: Zhang, Shuhao
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          Dates:
            – D: 01
              M: 08
              Text: Aug2024
              Type: published
              Y: 2024
          Identifiers:
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              Value: 20771312
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              Value: 12
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              Value: 8
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            – TitleFull: Journal of Marine Science & Engineering
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