IEEE Communications Letters
IEEE Communications Letters > 2012 > 16 > 7 > 1092 - 1095
IEEE Communications Letters > 2012 > 16 > 9 > 1400 - 1403
IEEE Communications Letters > 2012 > 16 > 7 > 1092 - 1095
IEEE Communications Letters > 2012 > 16 > 9 > 1400 - 1403