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IEEE Signal Processing Magazine > 2011 > 28 > 6 > 91 - 97
IEEE Transactions on Communications > 2008 > 56 > 7 > 1119 - 1126
IEEE Signal Processing Magazine > 2011 > 28 > 6 > 91 - 97
IEEE Transactions on Communications > 2008 > 56 > 7 > 1119 - 1126