IEEE Communications Letters
IEEE Communications Letters > 2012 > 16 > 4 > 506 - 509
IEEE Communications Letters > 2012 > 16 > 5 > 616 - 618
IEEE Communications Letters > 2012 > 16 > 4 > 506 - 509
IEEE Communications Letters > 2012 > 16 > 5 > 616 - 618