IEEE Communications Letters
IEEE Communications Letters > 2013 > 17 > 9 > 1852 - 1855
IEEE Communications Letters > 2013 > 17 > 9 > 1770 - 1773
IEEE Communications Letters > 2013 > 17 > 9 > 1852 - 1855
IEEE Communications Letters > 2013 > 17 > 9 > 1770 - 1773