DFT-based channel estimation using CIR adaptation in OFDM systems

Chan Ho An, Seung Hun Jang, Jun Kyoung Lee, Jeong Wook Seo, Dong Ku Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

16 Citations (Scopus)

Abstract

It is well known that discrete Fourier transform (DFT)-based channel estimators provides good performance with low complexity. Since its performance is influenced by estimated channel taps to lessen the noise effects, it is necessary to estimate the number of the channel taps and the time-domain position of them. Therefore, this paper proposes a modified DFT-based channel estimator with channel impulse response (CIR) adaptation which can simply find the significant channel path delays. The CIR adaptation uses scaling coefficients and threshold level which are generated by Monte-Carlo simulation. Simulation results show that the proposed method has a similar performance of the frequency-domain linear minimum mean squared error (LMMSE) method. Moreover, its performance is rather better than that of the LMMSE method under symbol timing offset (STO).

Original languageEnglish
Title of host publication9th International Conference on Advanced Communication Technology, ICACT 2007
Pages23-26
Number of pages4
Volume1
DOIs
Publication statusPublished - 2007 Jul 3
Event9th International Conference on Advanced Communication Technology, ICACT 2007 - Gangwon-Do, Korea, Republic of
Duration: 2007 Feb 122007 Feb 14

Other

Other9th International Conference on Advanced Communication Technology, ICACT 2007
CountryKorea, Republic of
CityGangwon-Do
Period07/2/1207/2/14

Fingerprint

Channel estimation
Impulse response
Discrete Fourier transforms
Orthogonal frequency division multiplexing
Monte Carlo simulation

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

An, C. H., Jang, S. H., Lee, J. K., Seo, J. W., & Kim, D. K. (2007). DFT-based channel estimation using CIR adaptation in OFDM systems. In 9th International Conference on Advanced Communication Technology, ICACT 2007 (Vol. 1, pp. 23-26). [4195075] https://doi.org/10.1109/ICACT.2007.358252
An, Chan Ho ; Jang, Seung Hun ; Lee, Jun Kyoung ; Seo, Jeong Wook ; Kim, Dong Ku. / DFT-based channel estimation using CIR adaptation in OFDM systems. 9th International Conference on Advanced Communication Technology, ICACT 2007. Vol. 1 2007. pp. 23-26
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An, CH, Jang, SH, Lee, JK, Seo, JW & Kim, DK 2007, DFT-based channel estimation using CIR adaptation in OFDM systems. in 9th International Conference on Advanced Communication Technology, ICACT 2007. vol. 1, 4195075, pp. 23-26, 9th International Conference on Advanced Communication Technology, ICACT 2007, Gangwon-Do, Korea, Republic of, 07/2/12. https://doi.org/10.1109/ICACT.2007.358252

DFT-based channel estimation using CIR adaptation in OFDM systems. / An, Chan Ho; Jang, Seung Hun; Lee, Jun Kyoung; Seo, Jeong Wook; Kim, Dong Ku.

9th International Conference on Advanced Communication Technology, ICACT 2007. Vol. 1 2007. p. 23-26 4195075.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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N2 - It is well known that discrete Fourier transform (DFT)-based channel estimators provides good performance with low complexity. Since its performance is influenced by estimated channel taps to lessen the noise effects, it is necessary to estimate the number of the channel taps and the time-domain position of them. Therefore, this paper proposes a modified DFT-based channel estimator with channel impulse response (CIR) adaptation which can simply find the significant channel path delays. The CIR adaptation uses scaling coefficients and threshold level which are generated by Monte-Carlo simulation. Simulation results show that the proposed method has a similar performance of the frequency-domain linear minimum mean squared error (LMMSE) method. Moreover, its performance is rather better than that of the LMMSE method under symbol timing offset (STO).

AB - It is well known that discrete Fourier transform (DFT)-based channel estimators provides good performance with low complexity. Since its performance is influenced by estimated channel taps to lessen the noise effects, it is necessary to estimate the number of the channel taps and the time-domain position of them. Therefore, this paper proposes a modified DFT-based channel estimator with channel impulse response (CIR) adaptation which can simply find the significant channel path delays. The CIR adaptation uses scaling coefficients and threshold level which are generated by Monte-Carlo simulation. Simulation results show that the proposed method has a similar performance of the frequency-domain linear minimum mean squared error (LMMSE) method. Moreover, its performance is rather better than that of the LMMSE method under symbol timing offset (STO).

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An CH, Jang SH, Lee JK, Seo JW, Kim DK. DFT-based channel estimation using CIR adaptation in OFDM systems. In 9th International Conference on Advanced Communication Technology, ICACT 2007. Vol. 1. 2007. p. 23-26. 4195075 https://doi.org/10.1109/ICACT.2007.358252