Jun Xu Xuemin Shen Jon W. Mark Jun Cai Quasi-Optimal Channel Assignment for Real-Time Video in OFDM Wireless Systems. 1417-1427 2008 7 IEEE Transactions on Wireless Communications 4 http://dx.doi.org/10.1109/TWC.2008.060991 db/journals/twc/twc7.html#XuSMC08