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IEEE Communications Letters > 2011 > 15 > 1 > 40 - 42
IEEE Transactions on Signal Processing > 2007 > 55 > 9 > 4581 - 4598
IEEE Communications Letters > 2011 > 15 > 1 > 40 - 42
IEEE Transactions on Signal Processing > 2007 > 55 > 9 > 4581 - 4598