IEEE Communications Letters
IEEE Communications Letters > 2012 > 16 > 6 > 917 - 920
IEEE Communications Letters > 2012 > 16 > 11 > 1796 - 1799
IEEE Communications Letters > 2012 > 16 > 6 > 917 - 920
IEEE Communications Letters > 2012 > 16 > 11 > 1796 - 1799