Wireless Communications
Error prediction for adaptive modulation and coding in multiple-antenna OFDM systems
Signal Processing - Special section: Advances in signal processing-assisted cross-layer designs
SARA: Stochastic Automata Rate Adaptation for IEEE 802.11 Networks
IEEE Transactions on Parallel and Distributed Systems
Simplified channel estimation for OFDM systems with multiple transmit antennas
IEEE Transactions on Wireless Communications
A stochastic MIMO radio channel model with experimental validation
IEEE Journal on Selected Areas in Communications
A Pragmatic PHY Abstraction Technique for Link Adaptation and MIMO Switching
IEEE Journal on Selected Areas in Communications
Link adaptation based on adaptive modulation and coding for multiple-antenna OFDM system
IEEE Journal on Selected Areas in Communications
Closed-loop adaptive IEEE 802.11n with PHY/MAC cross-layer constraints
MACOM'11 Proceedings of the 4th international conference on Multiple access communications
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This paper considers the use of cross-layer fast link adaptation (FLA) for WLANs employing a MIMO-OFDM physical layer. A packet error rate (PER)-based FLA technique that, without loss of generality, makes use of the exponential effective SNR mapping (EESM) is proposed. Additionally, an FLA scheme relying on bit error rate (BER) metrics is introduced that simplifies the link adaptation procedure without any significant performance degradation. Results show that both PER- and BER-based FLA techniques optimize the data throughput while satisfying prescribed quality of service constraints. Channel estimation errors have also been considered, revealing the importance of good channel estimators in order for FLA strategies to work satisfactorily.