Cross-relation-based frequency-domain blind channel estimation with multiple antennas in orthogonal frequency division multiplexing systems

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Frequency domain blind channel estimation methods for orthogonal frequency division multiplexing (OFDM) systems with multiple antennas are proposed, in which the cross relation between the channel gains and a single snapshot of the received signal on each subcarrier is utilised. Necessary and sufficient conditions for the identifiability of a single-input multiple-output OFDM channel estimator are derived and, furthermore, using a first-order perturbation analysis, the approximation of mean-squared-error (MSE) is analytically obtained, which shows that the proposed estimator is approximately unbiased at high signal-to-noise ratio. The proposed estimator exhibits lower MSEs than those of both the existing subspace-based and deterministic blind channel estimators and is less sensitive to the estimation error of the number of multipaths. Finally, the extension of the proposed channel estimation to multiple-input-multiple-output OFDM is presented.
Publisher
INST ENGINEERING TECHNOLOGY-IET
Issue Date
2013-11
Language
English
Article Type
Article
Keywords

SUBSPACE-BASED BLIND; OFDM SYSTEMS; CYCLIC PREFIX; RECEIVER DIVERSITY; DATA-TRANSMISSION; MIMO-OFDM; IDENTIFICATION; TIME; NETWORKS

Citation

IET COMMUNICATIONS, v.7, no.16, pp.1753 - 1768

ISSN
1751-8628
DOI
10.1049/iet-com.2012.0518
URI
http://hdl.handle.net/10203/188651
Appears in Collection
EE-Journal Papers(저널논문)
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