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IEEE Communications Letters > 2010 > 14 > 9 > 815 - 817
IEEE Communications Surveys & Tutorials > 2010 > 12 > 4 > 459 - 487
IEEE Communications Letters > 2008 > 12 > 4 > 274 - 276
IEEE Communications Letters > 2010 > 14 > 9 > 815 - 817
IEEE Communications Surveys & Tutorials > 2010 > 12 > 4 > 459 - 487
IEEE Communications Letters > 2008 > 12 > 4 > 274 - 276