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IEEE Communications Letters > 2011 > 15 > 6 > 680 - 682
IEEE Communications Magazine > 2009 > 47 > 4 > 118 - 122
IEEE Communications Magazine > 2008 > 46 > 9 > 136 - 143
IEEE Communications Letters > 2011 > 15 > 6 > 680 - 682
IEEE Communications Magazine > 2009 > 47 > 4 > 118 - 122
IEEE Communications Magazine > 2008 > 46 > 9 > 136 - 143