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|Title: ||A fast forward-backward channel estimation for MIMO STBC-OFDM systems|
|Authors: ||Lena Chang|
|Keywords: ||multiple input multiple output (MIMO)|
space time block code (STBC) orthogonal frequency division multiplexing (OFDM)
permutation invariant (PI) property
|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|
|Appears in Collections:||[通訊與導航工程學系] 期刊論文|
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