Key Lab Broadband Wireless Communication and Sensor Network Technology;
Ministry of Education;
Nanjing University of Posts and Telecommunications Nanjing 210003;
China;
Global Big Data Technologies Centre(GBDTC);
University of Technology Sydney;
Sydney 2007;
Australia;
energy efficiency; unequal power allocation; limited feedback; MU-MIMO; QoSguarantee and precoding;