IEEE TRANSACTIONS ON COMMUNICATIONS, vol. 57, no. 11, page. 3239 - 3243, 2009-11
IEEE COMMUNICATIONS LETTERS, vol. 7, no. 7, page. 329 - 331, 2003-07
IEEE TRANSACTIONS ON COMMUNICATIONS, vol. 51, no. 1, page. 5 - 7, 2003-01
IEEE TRANSACTIONS ON COMMUNICATIONS, vol. 49, no. 3, page. 405 - 408, 2001-03