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. |
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| 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] |
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| Database: | Engineering Source |
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| 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] |
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| ISSN: | 0278081X |
| DOI: | 10.1007/s00034-025-03025-9 |
