IEEE Communications Letters
IEEE Communications Letters > 2012 > 16 > 4 > 490 - 493
IEEE Communications Letters > 2012 > 16 > 6 > 925 - 928
IEEE Communications Letters > 2012 > 16 > 4 > 490 - 493
IEEE Communications Letters > 2012 > 16 > 6 > 925 - 928