IEICE TRANSACTIONS on Fundamentals
Time Domain Feedback Equalizer for Fast Fading Channel in OFDM with Scattered Pilot
Summary :
In this letter, a new feedback equalization scheme to suppress inter-carrier interference (ICI) in an OFDM system using scattered pilot is investigated. On a fast fading channel severe ICI occurs due to a Doppler shift and it deteriorates a bit error rate (BER) seriously because of small subcarrier spacing. In an ISDB-T receiver the equalization is mainly processed in a frequency domain because the scattered pilot is transmitted over the subcarriers. However, the frequency domain equalization may not suppress severe ICI in the case of the fast fading channel with a large Doppler shift. The proposed equalization scheme uses the scattered pilot symbols transformed in a time domain as the reference signal for feedback taps. Numerical results through computer simulation show that the proposed scheme improves the BER performance especially with low carrier-to-noise ratio (CNR) conditions.
- Publication
- IEICE TRANSACTIONS on Fundamentals Vol.E93-A No.12 pp.2691-2695
- Publication Date
- 2010/12/01
- Publicized
- Online ISSN
- 1745-1337
- DOI
- 10.1587/transfun.E93.A.2691
- Type of Manuscript
- Special Section LETTER (Special Section on Wideband Systems)
- Category
Authors
Keyword
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Yutaro NAKAGAWA, Yukitoshi SANADA, "Time Domain Feedback Equalizer for Fast Fading Channel in OFDM with Scattered Pilot" in IEICE TRANSACTIONS on Fundamentals,
vol. E93-A, no. 12, pp. 2691-2695, December 2010, doi: 10.1587/transfun.E93.A.2691.
Abstract: In this letter, a new feedback equalization scheme to suppress inter-carrier interference (ICI) in an OFDM system using scattered pilot is investigated. On a fast fading channel severe ICI occurs due to a Doppler shift and it deteriorates a bit error rate (BER) seriously because of small subcarrier spacing. In an ISDB-T receiver the equalization is mainly processed in a frequency domain because the scattered pilot is transmitted over the subcarriers. However, the frequency domain equalization may not suppress severe ICI in the case of the fast fading channel with a large Doppler shift. The proposed equalization scheme uses the scattered pilot symbols transformed in a time domain as the reference signal for feedback taps. Numerical results through computer simulation show that the proposed scheme improves the BER performance especially with low carrier-to-noise ratio (CNR) conditions.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/transfun.E93.A.2691/_p
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@ARTICLE{e93-a_12_2691,
author={Yutaro NAKAGAWA, Yukitoshi SANADA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Time Domain Feedback Equalizer for Fast Fading Channel in OFDM with Scattered Pilot},
year={2010},
volume={E93-A},
number={12},
pages={2691-2695},
abstract={In this letter, a new feedback equalization scheme to suppress inter-carrier interference (ICI) in an OFDM system using scattered pilot is investigated. On a fast fading channel severe ICI occurs due to a Doppler shift and it deteriorates a bit error rate (BER) seriously because of small subcarrier spacing. In an ISDB-T receiver the equalization is mainly processed in a frequency domain because the scattered pilot is transmitted over the subcarriers. However, the frequency domain equalization may not suppress severe ICI in the case of the fast fading channel with a large Doppler shift. The proposed equalization scheme uses the scattered pilot symbols transformed in a time domain as the reference signal for feedback taps. Numerical results through computer simulation show that the proposed scheme improves the BER performance especially with low carrier-to-noise ratio (CNR) conditions.},
keywords={},
doi={10.1587/transfun.E93.A.2691},
ISSN={1745-1337},
month={December},}
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TY - JOUR
TI - Time Domain Feedback Equalizer for Fast Fading Channel in OFDM with Scattered Pilot
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 2691
EP - 2695
AU - Yutaro NAKAGAWA
AU - Yukitoshi SANADA
PY - 2010
DO - 10.1587/transfun.E93.A.2691
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E93-A
IS - 12
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - December 2010
AB - In this letter, a new feedback equalization scheme to suppress inter-carrier interference (ICI) in an OFDM system using scattered pilot is investigated. On a fast fading channel severe ICI occurs due to a Doppler shift and it deteriorates a bit error rate (BER) seriously because of small subcarrier spacing. In an ISDB-T receiver the equalization is mainly processed in a frequency domain because the scattered pilot is transmitted over the subcarriers. However, the frequency domain equalization may not suppress severe ICI in the case of the fast fading channel with a large Doppler shift. The proposed equalization scheme uses the scattered pilot symbols transformed in a time domain as the reference signal for feedback taps. Numerical results through computer simulation show that the proposed scheme improves the BER performance especially with low carrier-to-noise ratio (CNR) conditions.
ER -
English
