Deepali Arora Panajotis Agathoklis Multiuser scheduling for downlink in multi-antenna wireless systems. 1718-1721 2005 conf/iscas/2005 ISCAS (2) http://dx.doi.org/10.1109/ISCAS.2005.1464938 db/conf/iscas/iscas2005-2.html#AroraA05