Time variations of wireless multipath channels can lead to severe intercarrier interference (ICI) in orthogonal frequency division multiplex (OFDM) systems, whereas large Doppler frequency spread can provide us with time diversity gain. In order to take advantage of the time diversity and to suppress the interference and noise enhancement at the same time, the receiver normally detects the data successively. In this letter, we propose an improved detection ordering based on the log-likelihood ratio (LLR) rather than the signal-to-noise ratio (SNR) for the successive detector. Using both theoretical analysis and computer simulation, it is shown that this scheme outperforms the traditional successive detection methods.
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Feng LI, Shihua ZHU, Mei RONG, "Improved Successive Detector for OFDM in Time-Variant Multipath Channels" in IEICE TRANSACTIONS on Communications,
vol. E92-B, no. 5, pp. 1892-1896, May 2009, doi: 10.1587/transcom.E92.B.1892.
Abstract: Time variations of wireless multipath channels can lead to severe intercarrier interference (ICI) in orthogonal frequency division multiplex (OFDM) systems, whereas large Doppler frequency spread can provide us with time diversity gain. In order to take advantage of the time diversity and to suppress the interference and noise enhancement at the same time, the receiver normally detects the data successively. In this letter, we propose an improved detection ordering based on the log-likelihood ratio (LLR) rather than the signal-to-noise ratio (SNR) for the successive detector. Using both theoretical analysis and computer simulation, it is shown that this scheme outperforms the traditional successive detection methods.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E92.B.1892/_p
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@ARTICLE{e92-b_5_1892,
author={Feng LI, Shihua ZHU, Mei RONG, },
journal={IEICE TRANSACTIONS on Communications},
title={Improved Successive Detector for OFDM in Time-Variant Multipath Channels},
year={2009},
volume={E92-B},
number={5},
pages={1892-1896},
abstract={Time variations of wireless multipath channels can lead to severe intercarrier interference (ICI) in orthogonal frequency division multiplex (OFDM) systems, whereas large Doppler frequency spread can provide us with time diversity gain. In order to take advantage of the time diversity and to suppress the interference and noise enhancement at the same time, the receiver normally detects the data successively. In this letter, we propose an improved detection ordering based on the log-likelihood ratio (LLR) rather than the signal-to-noise ratio (SNR) for the successive detector. Using both theoretical analysis and computer simulation, it is shown that this scheme outperforms the traditional successive detection methods.},
keywords={},
doi={10.1587/transcom.E92.B.1892},
ISSN={1745-1345},
month={May},}
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TY - JOUR
TI - Improved Successive Detector for OFDM in Time-Variant Multipath Channels
T2 - IEICE TRANSACTIONS on Communications
SP - 1892
EP - 1896
AU - Feng LI
AU - Shihua ZHU
AU - Mei RONG
PY - 2009
DO - 10.1587/transcom.E92.B.1892
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E92-B
IS - 5
JA - IEICE TRANSACTIONS on Communications
Y1 - May 2009
AB - Time variations of wireless multipath channels can lead to severe intercarrier interference (ICI) in orthogonal frequency division multiplex (OFDM) systems, whereas large Doppler frequency spread can provide us with time diversity gain. In order to take advantage of the time diversity and to suppress the interference and noise enhancement at the same time, the receiver normally detects the data successively. In this letter, we propose an improved detection ordering based on the log-likelihood ratio (LLR) rather than the signal-to-noise ratio (SNR) for the successive detector. Using both theoretical analysis and computer simulation, it is shown that this scheme outperforms the traditional successive detection methods.
ER -