Full Text:   <1117>

CLC number: TN929.5;TN914

On-line Access: 

Received: 2003-03-11

Revision Accepted: 2003-05-19

Crosschecked: 0000-00-00

Cited: 0

Clicked: 2879

Citations:  Bibtex RefMan EndNote GB/T7714

-   Go to

Article info.
1. Reference List
Open peer comments

Journal of Zhejiang University SCIENCE A 2004 Vol.5 No.1 P.45~49

http://doi.org/10.1631/jzus.2004.0045


A simple channel estimator for space-time coded OFDM systems in rapid fading channels


Author(s):  SHAN Shu-wei, LUO Han-wen, SONG Wen-tao

Affiliation(s):  Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200030, China

Corresponding email(s):   sswly@yahoo.com.cn

Key Words:  Space-time coding, OFDM, Channel estimation, EM algorithm, Doppler channel


Share this article to: More

SHAN Shu-wei, LUO Han-wen, SONG Wen-tao. A simple channel estimator for space-time coded OFDM systems in rapid fading channels[J]. Journal of Zhejiang University Science A, 2004, 5(1): 45~49.

@article{title="A simple channel estimator for space-time coded OFDM systems in rapid fading channels",
author="SHAN Shu-wei, LUO Han-wen, SONG Wen-tao",
journal="Journal of Zhejiang University Science A",
volume="5",
number="1",
pages="45~49",
year="2004",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2004.0045"
}

%0 Journal Article
%T A simple channel estimator for space-time coded OFDM systems in rapid fading channels
%A SHAN Shu-wei
%A LUO Han-wen
%A SONG Wen-tao
%J Journal of Zhejiang University SCIENCE A
%V 5
%N 1
%P 45~49
%@ 1869-1951
%D 2004
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2004.0045

TY - JOUR
T1 - A simple channel estimator for space-time coded OFDM systems in rapid fading channels
A1 - SHAN Shu-wei
A1 - LUO Han-wen
A1 - SONG Wen-tao
J0 - Journal of Zhejiang University Science A
VL - 5
IS - 1
SP - 45
EP - 49
%@ 1869-1951
Y1 - 2004
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2004.0045


Abstract: 
A simple channel estimator for space-time coded orthogonal frequency division multiplexing (OFDM) systems in rapid fading channels is proposed. The channels at the training bauds are estimated using the EM (expectation-maximization) algorithm, while the channels at the data bauds are estimated based on the method for modelling the time-varying channel as the linear combination of several time-invariant "doppler channels". Computer simulations showed that this estimator outperforms the decision-directed tracking in rapid fading channels and that the performance of this method can be improved by iteration.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

[1] Agarwal, D., Tarokh, V., Naguib, A. and Seshadri, N., 1998. Space-time coded OFDM for high data rate wireless communications over wideband channels. IEEE VTC, 3:2232-2236.

[2] Gong, Y. and Letaief, K. B., 2001. Low rank channel estimation for space-time coded wideband OFDM systems. IEEE VTC'01, 2:772-776.

[3] Li, Y., Cimini Jr., L. J. and Sollenberger, N. R., 1998. Robust channel estimation for OFDM systems with rapid dispersive fading channels. IEEE Trans. Commun., 46(7):902-915.

[4] Li, Y., Seshadri, N. and Ariyavistakul, S., 1999. Channel estimation for OFDM systems with transmitter diversity in mobile wireless channels. IEEE J. Select. Areas Commun., 17(3):461-471.

[5] Nilsson, R., Edfors, O., Sandell, M. and Brjesson, P. O., 1997. An Analysis of Two-dimensional Pilot-symbol assisted Modulation for OFDM. IEEE International Conference on Personal Wireless Communications, p.71-74.

[6] Proakis, J.G., 1995. Digital Communications. 3rd ed. Englewood Cliffs, NJ, Prentice-Hall.

[7] Thomas, T. A. and Vook, F. W., 2000. Multi-user Frequency-domain Channel Identification, Interference Suppression, and Equalization for Time-varying Broadband Wireless Communications. IEEE Sensor Array and Multichannel Signal Processing Workshop, p.444-448.

[8] Tarokh, V., Seshadri, N. and Calderbank, A. R., 1998. Space-time codes for high date rate wireless communication: performace criterion and code construction. IEEE Trans. Inform. Theory, 44(2):744-765.

[9] Xie, Y. and Georghiades, C. N., 2001. An EM-based channel estimation algorithm for OFDM with transmitter diversity. IEEE GLOBECOM, 2:871-874.

Open peer comments: Debate/Discuss/Question/Opinion

<1>

Please provide your name, email address and a comment





Journal of Zhejiang University-SCIENCE, 38 Zheda Road, Hangzhou 310027, China
Tel: +86-571-87952783; E-mail: cjzhang@zju.edu.cn
Copyright © 2000 - Journal of Zhejiang University-SCIENCE