R.  López-Valcarce and Mosquera, C., ?Maximum Likelihood SNR Estimation for Asynchronously Oversampled OFDM Signals?, in IEEE International Workshop on Signal Processing Advances in Wireless Communications, Recife, Brazil, 2008.

W.  Gappmair, López-Valcarce, R., and Mosquera, C., ?ML and EM Algorithm for non-data-aided SNR Estimation of Linearly Modulated Signals?, in International Symposium on Communication Systems, Networks and Signal Processing (CNSDSP), 2008, pp. 530-534.