IEICE TRANSACTIONS on Fundamentals
Viterbi-Type Inter-Carrier Interference Equalization for OFDM over Doubly Selective Channels
Summary :
Orthogonal Frequency Division Multiplexing (OFDM) transmission is robust to frequency-selective channels but sensitive to time-selective channels. Time variations of channels generate inter-carrier interference (ICI), which degrades system performance. In this paper, we develop frequency-domain Viterbi-type algorithm to effectively suppress the ICI, by exploiting the property of ICI terms in OFDM symbols. Null subcarriers, which are embedded in OFDM symbols for the reduction of interferences from/to adjacent bands, are exploited to reduce the complexity of the algorithm. Then, an approximate BER expression of Viterbi-type equalizer is derived. Simulations are provided to show the Viterbi-type equalizer works well in time- and frequency-selective (doubly selective) channel with affordable complexity.
- Publication
- IEICE TRANSACTIONS on Fundamentals Vol.E92-A No.8 pp.1905-1912
- Publication Date
- 2009/08/01
- Publicized
- Online ISSN
- 1745-1337
- DOI
- 10.1587/transfun.E92.A.1905
- Type of Manuscript
- Special Section PAPER (Special Section on Signal Processing)
- Category
- Communications
Authors
Keyword
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Shuichi OHNO, Kok Ann Donny TEO, "Viterbi-Type Inter-Carrier Interference Equalization for OFDM over Doubly Selective Channels" in IEICE TRANSACTIONS on Fundamentals,
vol. E92-A, no. 8, pp. 1905-1912, August 2009, doi: 10.1587/transfun.E92.A.1905.
Abstract: Orthogonal Frequency Division Multiplexing (OFDM) transmission is robust to frequency-selective channels but sensitive to time-selective channels. Time variations of channels generate inter-carrier interference (ICI), which degrades system performance. In this paper, we develop frequency-domain Viterbi-type algorithm to effectively suppress the ICI, by exploiting the property of ICI terms in OFDM symbols. Null subcarriers, which are embedded in OFDM symbols for the reduction of interferences from/to adjacent bands, are exploited to reduce the complexity of the algorithm. Then, an approximate BER expression of Viterbi-type equalizer is derived. Simulations are provided to show the Viterbi-type equalizer works well in time- and frequency-selective (doubly selective) channel with affordable complexity.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/transfun.E92.A.1905/_p
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@ARTICLE{e92-a_8_1905,
author={Shuichi OHNO, Kok Ann Donny TEO, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Viterbi-Type Inter-Carrier Interference Equalization for OFDM over Doubly Selective Channels},
year={2009},
volume={E92-A},
number={8},
pages={1905-1912},
abstract={Orthogonal Frequency Division Multiplexing (OFDM) transmission is robust to frequency-selective channels but sensitive to time-selective channels. Time variations of channels generate inter-carrier interference (ICI), which degrades system performance. In this paper, we develop frequency-domain Viterbi-type algorithm to effectively suppress the ICI, by exploiting the property of ICI terms in OFDM symbols. Null subcarriers, which are embedded in OFDM symbols for the reduction of interferences from/to adjacent bands, are exploited to reduce the complexity of the algorithm. Then, an approximate BER expression of Viterbi-type equalizer is derived. Simulations are provided to show the Viterbi-type equalizer works well in time- and frequency-selective (doubly selective) channel with affordable complexity.},
keywords={},
doi={10.1587/transfun.E92.A.1905},
ISSN={1745-1337},
month={August},}
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TY - JOUR
TI - Viterbi-Type Inter-Carrier Interference Equalization for OFDM over Doubly Selective Channels
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 1905
EP - 1912
AU - Shuichi OHNO
AU - Kok Ann Donny TEO
PY - 2009
DO - 10.1587/transfun.E92.A.1905
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E92-A
IS - 8
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - August 2009
AB - Orthogonal Frequency Division Multiplexing (OFDM) transmission is robust to frequency-selective channels but sensitive to time-selective channels. Time variations of channels generate inter-carrier interference (ICI), which degrades system performance. In this paper, we develop frequency-domain Viterbi-type algorithm to effectively suppress the ICI, by exploiting the property of ICI terms in OFDM symbols. Null subcarriers, which are embedded in OFDM symbols for the reduction of interferences from/to adjacent bands, are exploited to reduce the complexity of the algorithm. Then, an approximate BER expression of Viterbi-type equalizer is derived. Simulations are provided to show the Viterbi-type equalizer works well in time- and frequency-selective (doubly selective) channel with affordable complexity.
ER -
English
