Abstract
In this paper the standard space time block coding, the selection diversity space time block coding and eigen-beamforming techniques are compared in a block fading scenario taking account the channel estimation errors at the transmitter side. The comparison criterion is the signal to noise ratio obtained to the receiver at the output of the antenna combiner. The channel is assumed to be perfectly known at the receiver side and partially known at the transmitter side. A downlink scenario based on OFDM modulation is assumed. We are focusing on a time division duplex link, where the channel at the transmitter side can be estimated based on incoming signal. In order to compare these strategies a simple and robust list square channel estimator was introduced at transmitter side and the estimated channel was used to compute the beamformer vector and for antenna selection. The simulation results show that the eigen-beamforming strategy provide the best performance even under high channel estimation errors and even in a case of independent antenna fading.
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© 2004 Springer Science+Business Media Dordrecht
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Codreanu, M., Latva-Aho, M. (2004). Comparison between Space-Time Block Coding and Eigen-Beamforming in TDD MIMO-OFDM Downlink with Partial CSI Knowledge at the TX Side. In: Fazel, K., Kaiser, S. (eds) Multi-Carrier Spread-Spectrum. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-0502-8_41
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DOI: https://doi.org/10.1007/978-94-017-0502-8_41
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-6524-7
Online ISBN: 978-94-017-0502-8
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