IEEE Communications Letters
IEEE Communications Letters > 2008 > 12 > 2 > 155 - 157
IEEE Communications Letters > 2008 > 12 > 2 > 158 - 160
IEEE Communications Letters > 2008 > 12 > 2 > 155 - 157
IEEE Communications Letters > 2008 > 12 > 2 > 158 - 160