Proceedings of the 2nd International Symposium on Computer, Communication, Control and Automation (ISCCCA 2013)

An Improved Channel Estimation Method in OFDM System

Authors
Shunxian Li
Corresponding Author
Shunxian Li
Available Online February 2013.
DOI
10.2991/isccca.2013.57How to use a DOI?
Keywords
OFDM, channel estimation, Basis Expansion Model (BEM), doubly selective, inverse reconstruction method
Abstract

In this paper, we will focus on channel estimation (CE) in orthogonal frequency-division multiplexing (OFDM) systems. The time-varying (TV) channels are modeled by a basis expansion model (BEM). Due to the time-variation, the channel matrix in the frequency domain is no longer diagonal, but approximately banded. We use a pilot-aided algorithm for estimation of rapidly varying wireless channels in OFDM systems. The performs is good when the channels vary on the scale of a single OFDM symbol duration, which occurs in mobile communication scenarios such as WiMAX, WAVE, and DVB-T. We recover Fourier coefficients of the channel taps by the pilot information. We then estimate the BEM coefficients of the channel taps from their respective Fourier coefficients using a recently developed inverse reconstruction method. We compare some BEM models in inverse methods to find out the best ones in certain conditions.

Copyright
© 2013, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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Volume Title
Proceedings of the 2nd International Symposium on Computer, Communication, Control and Automation (ISCCCA 2013)
Series
Advances in Intelligent Systems Research
Publication Date
February 2013
ISBN
978-90-78677-63-5
ISSN
1951-6851
DOI
10.2991/isccca.2013.57How to use a DOI?
Copyright
© 2013, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Cite this article

TY  - CONF
AU  - Shunxian Li
PY  - 2013/02
DA  - 2013/02
TI  - An Improved Channel Estimation Method in OFDM System
BT  - Proceedings of the 2nd International Symposium on Computer, Communication, Control and Automation (ISCCCA 2013)
PB  - Atlantis Press
SP  - 230
EP  - 234
SN  - 1951-6851
UR  - https://doi.org/10.2991/isccca.2013.57
DO  - 10.2991/isccca.2013.57
ID  - Li2013/02
ER  -