homepages/14/2894 journals/tmc/BoppanaS11 journals/scn/SuB09 journals/wicomm/SuB09 journals/wicomm/SuX08 conf/globecom/SuB08 conf/globecom/BoppanaS08 conf/icc/SuB07 conf/iwcmc/SuB07 conf/iwcmc/SuB07a conf/wcnc/SuX07 conf/icc/WangSC02a