IEEE Communications Letters
IEEE Communications Letters > 2012 > 16 > 5 > 581 - 584
IEEE Communications Letters > 2012 > 16 > 11 > 1760 - 1763
IEEE Communications Letters > 2012 > 16 > 5 > 581 - 584
IEEE Communications Letters > 2012 > 16 > 11 > 1760 - 1763