IEEE Communications Letters
IEEE Communications Letters > 2012 > 16 > 4 > 498 - 501
IEEE Communications Letters > 2012 > 16 > 5 > 658 - 661
IEEE Communications Letters > 2012 > 16 > 4 > 498 - 501
IEEE Communications Letters > 2012 > 16 > 5 > 658 - 661