IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, vol. 8, no. 11, page. 5449 - 5454, 2009-11
IEEE SIGNAL PROCESSING LETTERS, vol. 16, no. 7, page. 620 - 623, 2009-07
IEEE COMMUNICATIONS LETTERS, vol. 13, no. 5, page. 321 - 323, 2009-05