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IEEE Communications Letters > 2009 > 13 > 4 > 212 - 214
IEEE Transactions on Wireless Communications > 2008 > 7 > 4 > 1195 - 1202
IEEE Communications Letters > 2009 > 13 > 4 > 212 - 214
IEEE Transactions on Wireless Communications > 2008 > 7 > 4 > 1195 - 1202