IEEE Communications Letters
IEEE Communications Letters > 2012 > 16 > 11 > 1737 - 1740
IEEE Communications Letters > 2012 > 16 > 11 > 1725 - 1728
IEEE Communications Letters > 2012 > 16 > 11 > 1737 - 1740
IEEE Communications Letters > 2012 > 16 > 11 > 1725 - 1728