5 January 2006 Downlink MIMO-OFDM system with adaptive resource allocation over Rayleigh fading space channel
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Proceedings Volume 5985, International Conference on Space Information Technology; 598511 (2006); doi: 10.1117/12.656735
Event: International Conference on Space information Technology, 2005, Wuhan, China
Abstract
In this paper, we investigate adaptive resource allocation strategy for downlink multi-input-multi-output (MIMO) orthogonal frequency division multiplexing (OFDM) system. We design a transmit scheme as a concatenation of dynamic sub-carriers and bit assignment, adaptive modulation and beam-forming. Our adaptive goal is margin adaptive optimization, which minimize the total transmission power subject to a target BER performance constraint on each sub-carrier, while meeting a constant bit rate. By use of Rayleigh fading model assumption, we introduce a new concept: the channel feedback coefficient, so as to compensate the error inducted by feedback channel. Simulation results show that the proposed resource allocation scheme outperforms the multi-user MIMO-OFDM with static allocation technique, and can lessen the performance loss caused by channel state information feedback error.
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Lee Li, Guangxi Zhu, Xiao Xiao, Wenming Liu, "Downlink MIMO-OFDM system with adaptive resource allocation over Rayleigh fading space channel", Proc. SPIE 5985, International Conference on Space Information Technology, 598511 (5 January 2006); doi: 10.1117/12.656735; https://doi.org/10.1117/12.656735
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