Title:
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Robust power allocation algorithms for MIMO OFDM systems with imperfect CSI
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Author:
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Rey Micolau, Francesc; Lamarca Orozco, M. Meritxell; Vázquez Grau, Gregorio
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. SPCOM - Grup de Recerca de Processament del Senyal i Comunicacions |
Abstract:
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This paper presents a Bayesian approach to the design of transmit prefiltering matrices in closed-loop schemes robust to channel estimation errors. The algorithms are derived for a multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system. Two different optimization
criteria are analyzed: the minimization of the mean square error and the minimization of the bit error rate. In both cases, the transmitter design is based on the singular value decomposition (SVD) of the conditional mean of the channel response, given the channel estimate. The performance of the proposed algorithms is analyzed,
and their relationship with existing algorithms is indicated. As with
other previously proposed solutions, the minimum bit error rate algorithm
converges to the open-loop transmission scheme for very poor CSI estimates. |
Abstract:
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Peer Reviewed |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Processament del senyal -MIMO systems -Bayes methods -Channel estimation error -Closed loop systems -Error statistics -Matrix algebra -Mean square error methods -MIMO systems -OFDM modulation -Optimisation -Singular value decomposition -Robust power allocation algorithm -OFDM system -Imperfect CSI -Bayesian approach -Prefiltering matrix -Closed-loop scheme -Bit error rate algorithm -Open-loop transmission scheme -Channel state information -Fading channel -Transceiver optimization -Wireless communication -BER -MIMO Channels -Power allocations -Feedback -Diversity -Joint transceiver optimization -Linear precoding -SVD -MIMO systems |
Rights:
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Document type:
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Article |
Published by:
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IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
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