@conference {639, title = {Optimum Training for CSI Acquisition in Cognitive Radio Channels}, booktitle = {Asilomar Conference on Signals, Systems, and Computers}, year = {2012}, address = {Pacific Grove, CA}, keywords = {adaptive signal processing, cognitive radio, dynacs}, doi = {10.1109/ACSSC.2012.6488973}, author = {Alberto Rico-Alvari{\~n}o and C. Mosquera} }