IEEE Communications Letters
IEEE Communications Letters > 2017 > 21 > 8 > 1739 - 1742
IEEE Communications Letters > 2017 > 21 > 8 > 1747 - 1750
IEEE Communications Letters > 2017 > 21 > 8 > 1739 - 1742
IEEE Communications Letters > 2017 > 21 > 8 > 1747 - 1750