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IEEE Communications Letters > 2012 > 16 > 4 > 522 - 525
IEEE Transactions on Communications > 2011 > 59 > 4 > 930 - 935
IEEE Transactions on Communications > 2010 > 58 > 12 > 3491 - 3499
IEEE International Conference on Communications, 2005. ICC 2005. 2005 > 4 > 2543 - 2547 Vol. 4