IEEE COMMUNICATIONS LETTERS, vol. 10, no. 5, page. 356 - 358, 2006-05
IEICE TRANSACTIONS ON COMMUNICATIONS, vol. E88-B, no. 5, page. 2093 - 2101, 2005-05
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IEEE COMMUNICATIONS LETTERS, vol. 8, no. 9, page. 576 - 578, 2004-09
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