@conference {ValcarceSPAWC07,
	title = {Iterative Envelope-Based SNR Estimation for Non-Constant Modulus Constellations},
	booktitle = {IEEE Workshop on Signal Processing Advances in Wireless Communications (SPAWC)},
	year = {2007},
	keywords = {EM, SNR, synchronization},
	author = {R. L{\'o}pez-Valcarce and C. Mosquera and Wilfried Gappmair}
}
