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Oversampling Based Channel Estimation with Time Domain Decorrelation for Channels with Colored Noise and Interference.

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Title: Oversampling Based Channel Estimation with Time Domain Decorrelation for Channels with Colored Noise and Interference.
Authors: Wang, Jui Teng1 (AUTHOR) jtwang@ncnu.edu.tw
Source: Circuits, Systems & Signal Processing. May2025, Vol. 44 Issue 5, p3687-3696. 10p.
Subjects: Signal sampling, Channel estimation, Bandwidths, Noise, Signs & symbols, White noise
Abstract: The oversampling based channel estimation with time domain decorrelation (OCE-TDD) is proposed in this paper for channel with colored noise and interference. In OCE-TDD, the training vectors are transmitted in the fashion that has the same bandwidth and the same energy as those in conventional training-based channel estimation, but the received signal is sampled with the sampling rate that is a times the symbol rate ( a ≥ 1 ) and a transformation is imposed on the samples so that colored noise and interference are decorrelated in time domain. The case where there are b independent interfering symbols for each symbol period is considered and it is shown that if a ≥ b + 1 , then the effect of interference can be eliminated by increasing a. This result implies that the effect of interference can be eliminated by OCE-TDD without consuming excess bandwidth or excess energy. It is also shown that with OCE-TDD, the channel estimation error for the case with colored noise is smaller than the channel estimation error for the case with white noise. [ABSTRACT FROM AUTHOR]
Copyright of Circuits, Systems & Signal Processing is the property of Springer Nature 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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  Data: Oversampling Based Channel Estimation with Time Domain Decorrelation for Channels with Colored Noise and Interference.
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  Data: <searchLink fieldCode="AR" term="%22Wang%2C+Jui+Teng%22">Wang, Jui Teng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> jtwang@ncnu.edu.tw</i>
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  Data: <searchLink fieldCode="JN" term="%22Circuits%2C+Systems+%26+Signal+Processing%22">Circuits, Systems & Signal Processing</searchLink>. May2025, Vol. 44 Issue 5, p3687-3696. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Signal+sampling%22">Signal sampling</searchLink><br /><searchLink fieldCode="DE" term="%22Channel+estimation%22">Channel estimation</searchLink><br /><searchLink fieldCode="DE" term="%22Bandwidths%22">Bandwidths</searchLink><br /><searchLink fieldCode="DE" term="%22Noise%22">Noise</searchLink><br /><searchLink fieldCode="DE" term="%22Signs+%26+symbols%22">Signs & symbols</searchLink><br /><searchLink fieldCode="DE" term="%22White+noise%22">White noise</searchLink>
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  Data: The oversampling based channel estimation with time domain decorrelation (OCE-TDD) is proposed in this paper for channel with colored noise and interference. In OCE-TDD, the training vectors are transmitted in the fashion that has the same bandwidth and the same energy as those in conventional training-based channel estimation, but the received signal is sampled with the sampling rate that is a times the symbol rate ( a ≥ 1 ) and a transformation is imposed on the samples so that colored noise and interference are decorrelated in time domain. The case where there are b independent interfering symbols for each symbol period is considered and it is shown that if a ≥ b + 1 , then the effect of interference can be eliminated by increasing a. This result implies that the effect of interference can be eliminated by OCE-TDD without consuming excess bandwidth or excess energy. It is also shown that with OCE-TDD, the channel estimation error for the case with colored noise is smaller than the channel estimation error for the case with white noise. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Circuits, Systems & Signal Processing is the property of Springer Nature 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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        Value: 10.1007/s00034-025-03025-9
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        Text: English
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      – SubjectFull: Signal sampling
        Type: general
      – SubjectFull: Channel estimation
        Type: general
      – SubjectFull: Bandwidths
        Type: general
      – SubjectFull: Noise
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      – SubjectFull: Signs & symbols
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              Text: May2025
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