IEICE TRANSACTIONS ON COMMUNICATIONS, vol. E86-B, no. 3, page. 1063 - 1072, 2003-03
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, vol. 20, no. 5, page. 959 - 973, 2002-06
IEEE TRANSACTIONS ON SIGNAL PROCESSING, vol. 49, no. 8, page. 1768 - 1785, 2001-08