Yong Oh Lee Jongkyung Kim Kyung-Ho Sohn Jongsoo Seo Young Yong Kim Adaptive Packet Assignment Schemes in Multi-User OFDM Systems. 1317-1320 2007 conf/vtc/2007s VTC Spring http://dx.doi.org/10.1109/VETECS.2007.276 db/conf/vtc/vtc2007s.html#LeeKSSK07