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IEEE Communications Letters > 2015 > 19 > 3 > 427 - 430
IEEE Communications Letters > 2014 > 18 > 9 > 1575 - 1578
IEEE Transactions on Wireless Communications > 2012 > 11 > 3 > 885 - 891
Electronics Letters > 2008 > 44 > 5 > 340 - 341