IEEE Communications Letters
IEEE Communications Letters > 2012 > 16 > 5 > 634 - 637
IEEE Communications Letters > 2012 > 16 > 11 > 1756 - 1759
IEEE Communications Letters > 2012 > 16 > 5 > 634 - 637
IEEE Communications Letters > 2012 > 16 > 11 > 1756 - 1759