@conference {uvigo:diamond, title = {Diamond contour-based phase recovery for (cross-)QAM constellations}, booktitle = {IEEE Workshop on Statistical Signal Processing (SSP)}, year = {2005}, address = {Bordeaux, France}, keywords = {adaptive signal processing, synchronization}, doi = {10.1109/SSP.2005.1628678}, author = {Marcos {\'A}lvarez-D{\'\i}az and R. L{\'o}pez-Valcarce} }