DocumentCode :
3521356
Title :
Design of MIMO communication systems robust to eigenvector mismatch problem
Author :
Taniguchi, Takafumi ; Takemoto, R. ; Tran, N.X. ; Karasawa, Y.
Author_Institution :
Dept. of Electron. Eng., Univ. of Electro-Commun., Tokyo, Japan
fYear :
2003
fDate :
14-17 Dec. 2003
Firstpage :
74
Lastpage :
77
Abstract :
This work presents a design method of multiple input multiple output (MIMO) wireless systems that shows robustness to eigenvector mismatch problem between the transmitter and receiver arrays. This problem often happens when the first and second largest eigenvalues are close together that results in the disconnection or quality degradation of communications. The proposed method is based on the recovery of the correct weight pair between the transceiver and receiver. First, to cope with the uncertainness of eigenvectors coming from the eigenvalue degeneration of the channel correlation matrix, we give a procedure to derive a unique weight common in both arrays. Then through computer simulations, it is shown that this approach achieves high SNR without losing the orthogonality of weights for plural MIMO paths as in the case of the eigenvector exchange when the relation of the eigenvalues is changed in one side of the arrays.
Keywords :
MIMO systems; antenna arrays; eigenvalues and eigenfunctions; matrix algebra; mobile radio; receiving antennas; telecommunication channels; transmitting antennas; MIMO communication systems; channel correlation matrix; eigenvector exchange; eigenvector mismatch problem; mobile communications; multiple input multiple output wireless systems; quality degradation; receiver arrays; transceiver; transmitter arrays; weight orthogonality; Antenna arrays; Communication systems; Computer simulation; Degradation; Eigenvalues and eigenfunctions; MIMO; Receiving antennas; Robustness; Transmitters; Transmitting antennas;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signal Processing and Information Technology, 2003. ISSPIT 2003. Proceedings of the 3rd IEEE International Symposium on
Print_ISBN :
0-7803-8292-7
Type :
conf
DOI :
10.1109/ISSPIT.2003.1341063
Filename :
1341063
Link To Document :
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