Proceedings of the 2015 International Conference on Automation, Mechanical Control and Computational Engineering

Semi-blind Channel Estimation for MIMO-OFDM Systems Based on Received Signal Reconstruction

Authors
Weijia Cui, You Zhou
Corresponding Author
Weijia Cui
Available Online April 2015.
DOI
https://doi.org/10.2991/amcce-15.2015.338How to use a DOI?
Keywords
MIMO-OFDM; Blind channel estimation; Subspace; Signal reconstruction; QR decomposition; Gram-Schmidt orthogonalization;
Abstract
Blind channel estimation for MIMO-OFDM systems was discussed, and a subspace based blind channel estimation algorithm by re-constructing the received signal and its simplified one were proposed. The algorithm changed the channel matrix of the transfer function into a block Toeplitz high matrix exploiting OFDM cyclic prefix, and the channel estimation characteristic equation was obtained with the orthogonality between the signal subspace and the noise subspace of the reconstructed signal. In order to eliminate the influence of virtual carriers, the singular value decomposition of the equivalent transmit signal was imported. The simplified algorithm exploited a QR decomposition and Gram-Schmidt orthogonalization process aiming at reducing the complexity of obtaining the noise subspace. Simulation results illustrate the performance of the proposed algorithm via numerical experiments compared with the other one, and it’s insensitive to overestimates of the true channel order.
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Proceedings
2015 International Conference on Automation, Mechanical Control and Computational Engineering
Part of series
Advances in Intelligent Systems Research
Publication Date
April 2015
ISBN
978-94-62520-64-6
ISSN
1951-6851
DOI
https://doi.org/10.2991/amcce-15.2015.338How to use a DOI?
Open Access
This is an open access article distributed under the CC BY-NC license.

Cite this article

TY  - CONF
AU  - Weijia Cui
AU  - You Zhou
PY  - 2015/04
DA  - 2015/04
TI  - Semi-blind Channel Estimation for MIMO-OFDM Systems Based on Received Signal Reconstruction
BT  - 2015 International Conference on Automation, Mechanical Control and Computational Engineering
PB  - Atlantis Press
SN  - 1951-6851
UR  - https://doi.org/10.2991/amcce-15.2015.338
DO  - https://doi.org/10.2991/amcce-15.2015.338
ID  - Cui2015/04
ER  -