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IEEE Communications Letters > 2009 > 13 > 8 > 615 - 617
IEEE Transactions on Wireless Communications > 2008 > 7 > 12-2 > 5336 - 5345
IEEE Communications Letters > 2009 > 13 > 8 > 615 - 617
IEEE Transactions on Wireless Communications > 2008 > 7 > 12-2 > 5336 - 5345