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IEEE Communications Letters > 2016 > 20 > 7 > 1273 - 1276
IEEE Communications Letters > 2013 > 17 > 4 > 777 - 780
IEEE Communications Letters > 2016 > 20 > 7 > 1273 - 1276
IEEE Communications Letters > 2013 > 17 > 4 > 777 - 780