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This article is part of the series Implementation Aspects and Testbeds for MIMO Systems.

Open Access Research Article

A MIMO-OFDM Testbed for Wireless Local Area Networks

Albert Guilléni Fàbregas1*, Maxime Guillaud2, Dirk TM Slock2, Giuseppe Caire3, Karine Gosse4, Stéphanie Rouquette4, Alexandre Ribeiro Dias4, Philippe Bernardin4, Xavier Miet4, Jean-Marc Conrat5, Yann Toutain6, Alain Peden7 and Zaiqing Li7

Author Affiliations

1 Institute for Telecommunications Research, University of South Australia, SPRI Building, Mawson Lakes Boulevard, Mawson Lakes, SA 5095, Australia

2 Eurécom Institute, 2229 Route des Crêtes, Sophia Antipolis 06904, France

3 Electrical Engineering Department, University of Southern California, 3740 McClintock Avenue, Los Angeles, CA 90089, USA

4 Motorola Labs, Centre de Recherche de Motorola, Espace Technologique Saint-Aubin, Gif-sur-Yvette 91193, France

5 France Telecom R&D, 3 avenue des Usines, Belfort 90007, France

6 Antennessa, avenue la Perouse, Plouzane 29280, France

7 École Nationale Supérieure des Télécommunications de Bretagne, Technopôle Brest-Iroise, Brest 29238, France

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EURASIP Journal on Advances in Signal Processing 2006, 2006:018083  doi:10.1155/ASP/2006/18083

The electronic version of this article is the complete one and can be found online at: http://asp.eurasipjournals.com/content/2006/1/018083

Received:15 December 2004
Revisions received:11 May 2005
Accepted:21 June 2005
Published:21 March 2006

© 2006 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.

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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