A MIMO-OFDM testbed for wireless local area networks
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(Published version)
Date
2006
Authors
Guillen i Fabregas, A.
Guillaud, M.
Slock, D.T.M.
Caire, G.
Gosse, K.
Rouquette, S.
Dias, A.R.
Bernardin, P.
Miet, X.
Conrat, J.M.
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Journal article
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EURASIP Journal on Advances in Signal Processing, 2006; 2006(18083):1-20
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Abstract
We describe the design steps and final implementation of a MIMO OFDM prototype platform developed to enhance the performance of wireless LAN standards such as HiperLAN/2 and 802.11, using multiple transmit and multiple receive antennas. We first describe the channel measurement campaign used to characterize the indoor operational propagation environment, and analyze the influence of the channel on code design through a ray-tracing channel simulator. We also comment on some antenna and RF issues which are of importance for the final realization of the testbed. Multiple coding, decoding, and channel estimation strategies are discussed and their respective performance-complexity trade-offs are evaluated over the realistic channel obtained from the propagation studies. Finally, we present the design methodology, including cross-validation of the Matlab, C++, and VHDL components, and the final demonstrator architecture. We highlight the increased measured performance of the MIMO testbed over the single-antenna system.
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Copyright 2006 Albert Guillén i Fàbregas et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/3.0/)