Yogachandran Rahulamathavan Sangarapillai Lambotharan A Rate Balancing Technique for MIMO-Cognitive Radio Network under a Mixed QoS Requirement. 1-5 2011 GLOBECOM http://dx.doi.org/10.1109/GLOCOM.2011.6133898 conf/globecom/2011 db/conf/globecom/globecom2011.html#RahulamathavanL11