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Robust power allocation algorithms for MIMO OFDM systems with imperfect CSI

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Rey Micolau, FrancescMés informacióMés informacióMés informació
Lamarca Orozco, M. MeritxellMés informacióMés informacióMés informació
Vázquez Grau, GregorioMés informacióMés informacióMés informació
Document typeArticle
Defense date2005-03-31
PublisherIEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Rights accessOpen Access
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
Abstract
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.
CitationRey, F.; Lamarca, M.; Vázquez, G. Robust power allocation algorithms for MIMO OFDM systems with imperfect CSI. IEEE Transactions on Signal Processing 2005, vol. 53, núm.3, p. 1070-1085. 
URIhttp://hdl.handle.net/2117/1494
ISSN1053-587X
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