Xi Zhang Jia Tang QoS-Driven Asynchronous Uplink Subchannel Allocation Algorithms for Space-Time OFDM-CDMA Systems in Wireless Networks. 27-34 2004 conf/qshine/2004 QSHINE http://doi.ieeecomputersociety.org/10.1109/QSHINE.2004.45 db/conf/qshine/qshine2004.html#ZhangT04