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Authors:
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Makoto Amamiya
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Musashino Electrical Communication Laboratory, N.T.T., Tokyo, Japan
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Ryuzo Hasegawa
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Musashino Electrical Communication Laboratory, N.T.T., Tokyo, Japan
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Osamu Nakamura
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Musashino Electrical Communication Laboratory, N.T.T., Tokyo, Japan
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Hirohide Mikami
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Musashino Electrical Communication Laboratory, N.T.T., Tokyo, Japan
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