IEEE Communications Letters
IEEE Communications Letters > 2012 > 16 > 5 > 612 - 615
IEEE Communications Letters > 2012 > 16 > 5 > 666 - 669
IEEE Communications Letters > 2012 > 16 > 5 > 738 - 741
IEEE Communications Letters > 2012 > 16 > 5 > 650 - 653
IEEE Communications Letters > 2012 > 16 > 5 > 642 - 645