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Masashi Hayakawa
The University of Electro-Commwzications, Department of Electronic Engineering
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Minako Sekiguchi
The University of Electro-Commwzications, Department of Electronic Engineering
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Yasuhide Hobara
The University of Electro-Commwzications, Department of Electronic Engineering
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Alexander P Nickolaenko
Usikov Institute for Radio-Physics and Electronics,National Academy of Science of the Ukraine