IEICE TRANSACTIONS on Communications
A Channel Estimation Method for a Highly Mobile OFDM Wireless Access System
Summary :
Pilot-symbol-aided (PSA) channel estimation for OFDM wireless access systems enables the periodic estimation of channel frequency response by generating reference data from the received OFDM signals. The accuracy of this channel estimation can be improved through the average over a certain time period in each subcarrier-channel. However, the accuracy of the channel estimates by the average degrades as the Doppler shift is large due to a decrease in the average section size according to the Doppler shift for the tracking of the time-varying channel. This paper proposes a novel PSA channel estimation method to mitigate the influence of the noises and interferences. This method detects the channel estimates affected by the noises and interferences, and then removes them before the arithmetic or harmonic averaging to avoid propagating the influence of the noises and interferences. This paper also evaluated the proposed channel estimation method by clipping log-likelihood ratio (LLR) data to inspect the influence of the channel estimation on the LLR calculation by computer simulation.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E88-B No.1 pp.282-291
- Publication Date
- 2005/01/01
- Publicized
- Online ISSN
- DOI
- 10.1093/ietcom/e88-b.1.282
- Type of Manuscript
- PAPER
- Category
- Wireless Communication Technologies
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Keyword
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Ryuhei FUNADA, Hiroshi HARADA, Yukiyoshi KAMIO, Shoji SHINODA, "A Channel Estimation Method for a Highly Mobile OFDM Wireless Access System" in IEICE TRANSACTIONS on Communications,
vol. E88-B, no. 1, pp. 282-291, January 2005, doi: 10.1093/ietcom/e88-b.1.282.
Abstract: Pilot-symbol-aided (PSA) channel estimation for OFDM wireless access systems enables the periodic estimation of channel frequency response by generating reference data from the received OFDM signals. The accuracy of this channel estimation can be improved through the average over a certain time period in each subcarrier-channel. However, the accuracy of the channel estimates by the average degrades as the Doppler shift is large due to a decrease in the average section size according to the Doppler shift for the tracking of the time-varying channel. This paper proposes a novel PSA channel estimation method to mitigate the influence of the noises and interferences. This method detects the channel estimates affected by the noises and interferences, and then removes them before the arithmetic or harmonic averaging to avoid propagating the influence of the noises and interferences. This paper also evaluated the proposed channel estimation method by clipping log-likelihood ratio (LLR) data to inspect the influence of the channel estimation on the LLR calculation by computer simulation.
URL: https://global.ieice.org/en_transactions/communications/10.1093/ietcom/e88-b.1.282/_p
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@ARTICLE{e88-b_1_282,
author={Ryuhei FUNADA, Hiroshi HARADA, Yukiyoshi KAMIO, Shoji SHINODA, },
journal={IEICE TRANSACTIONS on Communications},
title={A Channel Estimation Method for a Highly Mobile OFDM Wireless Access System},
year={2005},
volume={E88-B},
number={1},
pages={282-291},
abstract={Pilot-symbol-aided (PSA) channel estimation for OFDM wireless access systems enables the periodic estimation of channel frequency response by generating reference data from the received OFDM signals. The accuracy of this channel estimation can be improved through the average over a certain time period in each subcarrier-channel. However, the accuracy of the channel estimates by the average degrades as the Doppler shift is large due to a decrease in the average section size according to the Doppler shift for the tracking of the time-varying channel. This paper proposes a novel PSA channel estimation method to mitigate the influence of the noises and interferences. This method detects the channel estimates affected by the noises and interferences, and then removes them before the arithmetic or harmonic averaging to avoid propagating the influence of the noises and interferences. This paper also evaluated the proposed channel estimation method by clipping log-likelihood ratio (LLR) data to inspect the influence of the channel estimation on the LLR calculation by computer simulation.},
keywords={},
doi={10.1093/ietcom/e88-b.1.282},
ISSN={},
month={January},}
Copy
TY - JOUR
TI - A Channel Estimation Method for a Highly Mobile OFDM Wireless Access System
T2 - IEICE TRANSACTIONS on Communications
SP - 282
EP - 291
AU - Ryuhei FUNADA
AU - Hiroshi HARADA
AU - Yukiyoshi KAMIO
AU - Shoji SHINODA
PY - 2005
DO - 10.1093/ietcom/e88-b.1.282
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E88-B
IS - 1
JA - IEICE TRANSACTIONS on Communications
Y1 - January 2005
AB - Pilot-symbol-aided (PSA) channel estimation for OFDM wireless access systems enables the periodic estimation of channel frequency response by generating reference data from the received OFDM signals. The accuracy of this channel estimation can be improved through the average over a certain time period in each subcarrier-channel. However, the accuracy of the channel estimates by the average degrades as the Doppler shift is large due to a decrease in the average section size according to the Doppler shift for the tracking of the time-varying channel. This paper proposes a novel PSA channel estimation method to mitigate the influence of the noises and interferences. This method detects the channel estimates affected by the noises and interferences, and then removes them before the arithmetic or harmonic averaging to avoid propagating the influence of the noises and interferences. This paper also evaluated the proposed channel estimation method by clipping log-likelihood ratio (LLR) data to inspect the influence of the channel estimation on the LLR calculation by computer simulation.
ER -
English
