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IEEE Communications Letters > 2010 > 14 > 2 > 118 - 120
IEEE Transactions on Communications > 2009 > 57 > 9 > 2655 - 2662
IEEE Communications Letters > 2010 > 14 > 2 > 118 - 120
IEEE Transactions on Communications > 2009 > 57 > 9 > 2655 - 2662