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IEEE Transactions on Wireless Communications > 2011 > 10 > 3 > 733 - 738
IEEE Communications Letters > 2010 > 14 > 9 > 809 - 811
IEEE Transactions on Wireless Communications > 2009 > 8 > 3 > 1122 - 1127
IEEE Transactions on Communications > 2008 > 56 > 7 > 1119 - 1126