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IEEE Communications Letters > 2011 > 15 > 3 > 275 - 277
IEEE Transactions on Communications > 2008 > 56 > 7 > 1119 - 1126
IEEE Communications Letters > 2011 > 15 > 3 > 275 - 277
IEEE Transactions on Communications > 2008 > 56 > 7 > 1119 - 1126