A MIMO-OFDM testbed for wireless local area networks

Authors:
Albert Guillén i Fàbregas;Maxime Guillaud;Dirk T. M. Slock;Giuseppe Caire;Karine Gosse;Stéphanie Rouquette;Alexandre Ribeiro Dias;Philippe Bernardin;Xavier Miet;Jean-Marc Conrat;Yann Toutain;Alain Peden;Zaiqing Li
Affiliations:
Institute for Telecommunications Research, University of South Australia, Mawson Lakes Boulevard, Mawson Lakes, SA, Australia;Eurécom Institute, Sophia Antipolis, France;Eurécom Institute, Sophia Antipolis, France;Electrical Engineering Department, University of Southern California, Los Angeles, CA;Motorola Labs., Centre de Recherche de Motorola, Espace Technologique Saint-Aubin, Gif-sur-Yvette, France;Motorola Labs., Centre de Recherche de Motorola, Espace Technologique Saint-Aubin, Gif-sur-Yvette, France;Motorola Labs., Centre de Recherche de Motorola, Espace Technologique Saint-Aubin, Gif-sur-Yvette, France;Motorola Labs., Centre de Recherche de Motorola, Espace Technologique Saint-Aubin, Gif-sur-Yvette, France;Motorola Labs., Centre de Recherche de Motorola, Espace Technologique Saint-Aubin, Gif-sur-Yvette, France;France Telecom R&D, Belfort, France;Antennessa, Plouzane, France;École Nationale Supérieure des Télécommunications de Bretagne, Technopôle Brest-Iroise, Brest, France;École Nationale Supérieure des Télécommunications de Bretagne, Technopôle Brest-Iroise, Brest, France
Venue:
EURASIP Journal on Applied Signal Processing
Year:
2006

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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.