TY - GEN
T1 - Time domain feedback equalizer for fast fading channel in OFDM with scattered pilot
AU - Nakagawa, Yutaro
AU - Sanada, Yukitoshi
PY - 2010
Y1 - 2010
N2 - In this paper, 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.
AB - In this paper, 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.
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U2 - 10.1109/ISITA.2010.5649007
DO - 10.1109/ISITA.2010.5649007
M3 - Conference contribution
AN - SCOPUS:78651290830
SN - 9781424460175
T3 - ISITA/ISSSTA 2010 - 2010 International Symposium on Information Theory and Its Applications
SP - 294
EP - 297
BT - ISITA/ISSSTA 2010 - 2010 International Symposium on Information Theory and Its Applications
PB - IEEE Computer Society
ER -