Cross-layer design of FDD-OFDM systems based on ACK/NAK feedbacks
IEEE Transactions on Information Theory
An efficient multiuser scheduling scheme for MIMO-CDMA wireless systems
WTS'09 Proceedings of the 2009 conference on Wireless Telecommunications Symposium
Downlink mobile OFDMA resource allocation with minimum user rate requests
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
A graph-based resource allocation algorithm for downlink MIMO-OFDMA networks
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Downlink OFDMA resource allocation under partial channel state information
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
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In most existing works, perfect knowledge of channel state information at the transmitter (CSIT) is assumed to realize the potential benefit of cross-layer scheduling and spatial multiplexing gains of MIMO/OFDMA systems. However, perfect knowledge of CSIT is not easy to achieve in practice due to estimation noise or delay in feedback. In this paper, we shall focus on the cross-layer design of downlink multi-antenna OFDMA systems with imperfect CSIT for slow fading channels. We shall show that our proposed cross-layer scheduler can exploit the multiuser diversity and spatial multiplexing gain even in the presence of moderate CSIT error.