@conference {RamirezVazquezICASSP11, title = {Multiantenna detection under noise uncertainty and primary user{\textquoteright}s spatial structure}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, year = {2011}, month = {May}, pages = {2948-2951}, publisher = {IEEE}, organization = {IEEE}, address = {Prage, Czech Republic}, keywords = {cognitive radio, generalized likelihood ratio test (GLRT), spectrum sensing}, author = {David Ram{\'\i}rez and Gonzalo V{\'a}zquez-Vilar and R. L{\'o}pez-Valcarce and Javier V{\'\i}a and Ignacio Santamar{\'\i}a} }