IEEE Communications Letters
IEEE Communications Letters > 2012 > 16 > 4 > 494 - 497
IEEE Communications Letters > 2012 > 16 > 11 > 1729 - 1732
IEEE Communications Letters > 2012 > 16 > 4 > 494 - 497
IEEE Communications Letters > 2012 > 16 > 11 > 1729 - 1732