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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/52271

Title: A fast forward-backward channel estimation for MIMO STBC-OFDM systems
Authors: Lena Chang
Contributors: 國立臺灣海洋大學:通訊與導航工程學系
Keywords: multiple input multiple output (MIMO)
space time block code (STBC) orthogonal frequency division multiplexing (OFDM)
permutation invariant (PI) property
channel estimation.
Date: 2018-12
Issue Date: 2019-06-21T02:36:40Z
Publisher: Journal of Marine Science and Technology
Abstract: Abstract: In the study, we develop a fast forward-backward estimation
(FFBE) method for multiple input multiple output (MIMO)
space time block code (STBC) orthogonal frequency division
multiplexing (OFDM) systems. We examined the matrix structure of the forward-backward (FB) correlation matrix and observed this matrix possessing permutation invariant (PI) property.
We also investigated the eigen-property of a matrix with PI property and proved its eigenvectors possessing symmetric property,
which can be calculated from two half dimensionality submatrices.
Based on these analyses, we propose a fast eigen-decomposition
algorithm to reduce the computations required in the eigendecomposition of FB correlation matrix. Then, the symmetric
property of eigenvectors of the forward-backward correlation
matrix is applied to develop the FFBE method to reduce the
computation complexity in channel estimation. FFBE achieves
the same performance as the existing forward-backward averaging (FBA) estimation method (Yu and Lin, 2009) and requires
one-fourth computation complexity of FBA. Computer simulations demonstrate the effectiveness and accuracy of the proposed
FFBE in channel estimation.
Relation: 26(6) pp.813-825
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/52271
Appears in Collections:[通訊與導航工程學系] 期刊論文

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