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IEEE Wireless Communications Letters > 2014 > 3 > 1 > 38 - 41
IEEE Transactions on Signal Processing > 2008 > 56 > 8-1 > 3613 - 3626
IEEE Transactions on Communications > 2008 > 56 > 7 > 1032 - 1037
IEEE Transactions on Signal Processing > 2008 > 56 > 8-1 > 3497 - 3509