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IEEE Systems Journal > 2017 > 11 > 2 > 661 - 672
IEEE Communications Surveys & Tutorials > 2016 > 18 > 2 > 1453 - 1499
IEEE Communications Letters > 2011 > 15 > 10 > 1123 - 1125
IEEE Systems Journal > 2017 > 11 > 2 > 661 - 672
IEEE Communications Surveys & Tutorials > 2016 > 18 > 2 > 1453 - 1499
IEEE Communications Letters > 2011 > 15 > 10 > 1123 - 1125