@conference {CogArt_2011_pub, title = {Spatial rank estimation in Cognitive Radio Networks with uncalibrated multiple antennas}, booktitle = {4th International Conference on Cognitive Radio and Advanced Spectrum Management}, year = {2011}, month = {October}, address = {Barcelona, Spain}, author = {Vazquez-Vilar, G. and Ram{\'\i}rez, David and L{\'o}pez-Valcarce, Roberto and V{\'\i}a, Javier and Santamar{\'\i}a, Ignacio} }