Blind Channel Estimation by EM Algorithm for OFDM Systems

Hirokazu ABE; Masahiro FUJII; Takanori IWAMATSU; Hiroyuki HATANO; Atsushi ITO; Yu WATANABE

doi:10.1587/transfun.E100.A.210

Blind Channel Estimation by EM Algorithm for OFDM Systems

Hirokazu ABE, Masahiro FUJII, Takanori IWAMATSU, Hiroyuki HATANO, Atsushi ITO, Yu WATANABE

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It is necessary to estimate channel state information coherently to equalize the received signal in wireless communication systems. The pilot symbol, known at the receiver, aided channel estimator degrades the transmission efficiency because it requires the signal spaces and the energy for the transmission. In this paper, we assume a fixed wireless communication system in line of sight slowly varying channel and propose a new blind channel estimation method without help from the pilot symbol for Orthogonal Frequency Division Multiplexing systems. The proposed estimator makes use of the Expectation-Maximization algorithm and the correlation property among the channel frequency responses by considering the assumed channel environment. By computer simulations, we show that the proposed estimator can asymptotically achieve bit error rate performance by using the ideal channel estimation.

Publication: IEICE TRANSACTIONS on Fundamentals Vol.E100-A No.1 pp.210-218

Publication Date: 2017/01/01

Publicized

Online ISSN: 1745-1337

DOI: 10.1587/transfun.E100.A.210

Type of Manuscript: Special Section PAPER (Special Section on Wideband Systems)

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Authors

Hirokazu ABE
  Utsunomiya University
Masahiro FUJII
  Utsunomiya University
Takanori IWAMATSU
  Fujitsu Telecom Networks Limited
Hiroyuki HATANO
  Utsunomiya University
Atsushi ITO
  Utsunomiya University
Yu WATANABE
  Utsunomiya University

Keyword

blind channel estimation, OFDM, EM algorithm, channel frequency response correlation, fixed wireless communication systems

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Hirokazu ABE, Masahiro FUJII, Takanori IWAMATSU, Hiroyuki HATANO, Atsushi ITO, Yu WATANABE, "Blind Channel Estimation by EM Algorithm for OFDM Systems" in IEICE TRANSACTIONS on Fundamentals, vol. E100-A, no. 1, pp. 210-218, January 2017, doi: 10.1587/transfun.E100.A.210.
Abstract: It is necessary to estimate channel state information coherently to equalize the received signal in wireless communication systems. The pilot symbol, known at the receiver, aided channel estimator degrades the transmission efficiency because it requires the signal spaces and the energy for the transmission. In this paper, we assume a fixed wireless communication system in line of sight slowly varying channel and propose a new blind channel estimation method without help from the pilot symbol for Orthogonal Frequency Division Multiplexing systems. The proposed estimator makes use of the Expectation-Maximization algorithm and the correlation property among the channel frequency responses by considering the assumed channel environment. By computer simulations, we show that the proposed estimator can asymptotically achieve bit error rate performance by using the ideal channel estimation.
URL: https://globals.ieice.org/en_transactions/fundamentals/10.1587/transfun.E100.A.210/_p

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@ARTICLE{e100-a_1_210,
author={Hirokazu ABE, Masahiro FUJII, Takanori IWAMATSU, Hiroyuki HATANO, Atsushi ITO, Yu WATANABE, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Blind Channel Estimation by EM Algorithm for OFDM Systems},
year={2017},
volume={E100-A},
number={1},
pages={210-218},
abstract={It is necessary to estimate channel state information coherently to equalize the received signal in wireless communication systems. The pilot symbol, known at the receiver, aided channel estimator degrades the transmission efficiency because it requires the signal spaces and the energy for the transmission. In this paper, we assume a fixed wireless communication system in line of sight slowly varying channel and propose a new blind channel estimation method without help from the pilot symbol for Orthogonal Frequency Division Multiplexing systems. The proposed estimator makes use of the Expectation-Maximization algorithm and the correlation property among the channel frequency responses by considering the assumed channel environment. By computer simulations, we show that the proposed estimator can asymptotically achieve bit error rate performance by using the ideal channel estimation.},
keywords={},
doi={10.1587/transfun.E100.A.210},
ISSN={1745-1337},
month={January},}

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TY - JOUR
TI - Blind Channel Estimation by EM Algorithm for OFDM Systems
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 210
EP - 218
AU - Hirokazu ABE
AU - Masahiro FUJII
AU - Takanori IWAMATSU
AU - Hiroyuki HATANO
AU - Atsushi ITO
AU - Yu WATANABE
PY - 2017
DO - 10.1587/transfun.E100.A.210
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E100-A
IS - 1
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - January 2017
AB - It is necessary to estimate channel state information coherently to equalize the received signal in wireless communication systems. The pilot symbol, known at the receiver, aided channel estimator degrades the transmission efficiency because it requires the signal spaces and the energy for the transmission. In this paper, we assume a fixed wireless communication system in line of sight slowly varying channel and propose a new blind channel estimation method without help from the pilot symbol for Orthogonal Frequency Division Multiplexing systems. The proposed estimator makes use of the Expectation-Maximization algorithm and the correlation property among the channel frequency responses by considering the assumed channel environment. By computer simulations, we show that the proposed estimator can asymptotically achieve bit error rate performance by using the ideal channel estimation.
ER -