Feedback threshold with guaranteed QoS in multiuser OFDM systems
YANG Rui-zhe, YUAN Chao-wei, TENG Ying-lei, ZHANG Yan-hua
Acta Metallurgica Sinica(English letters) . 2009, (2): 24 -28 .  DOI: 10.1016/S1005-8885(08)60196-X