Active measurements of a mimo WiMAX‐OFDM based system in reverberation chambers

Electromagnetic reverberation chambers can be used for multiple-input multiple-output (MIMO) systems testing.Currently, the tests focus on parameters such as correlation, diversity gain, efficiency, etc., by using a vector network analyzer. In contrast with these passive tests, a novel way of MIMO systems characterization is described in this article. It consists on evaluating bit error rate (BER) levels of a MIMO WiMAX-OFDM system according to the Signal-to-Noise Ratio (SNR) by establishing an active link between the transmitter and the receiver. The measurement process is set up in a reverberation chamber, where multipath frequency selective channels are emulated. The obtained results are compared to a reference case with single-input single-output (SISO) to evaluate the real improvements made by the studied system. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2347–2352, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25465

[1]  C. Decroze,et al.  Diversity antennas efficiencies enhancement , 2007, 2007 IEEE Antennas and Propagation Society International Symposium.

[2]  Aliou Diallo,et al.  Diversity Performance of Multiantenna Systems for UMTS Cellular Phones in Different Propagation Environments , 2008 .

[3]  M.A. Garcia-Fernandez,et al.  The Influence of Efficiency on Receive Diversity and MIMO Capacity for Rayleigh-Fading Channels , 2008, IEEE Transactions on Antennas and Propagation.

[4]  M. B. Knudsen,et al.  Spherical outdoor to indoor power spectrum model at the mobile terminal , 2002, IEEE J. Sel. Areas Commun..

[5]  Sinem Coleri Ergen,et al.  Channel estimation techniques based on pilot arrangement in OFDM systems , 2002, IEEE Trans. Broadcast..

[6]  C. Decroze,et al.  Measurement of antenna diversity performances on a compact wireless device, in real environment , 2008, 2008 IEEE Antennas and Propagation Society International Symposium.

[7]  Onsy Abdel Alim,et al.  Channel estimation and equalization for fixed/mobile OFDM WiMAX system in simulink , 2008, MOBILWARE.

[8]  Siavash M. Alamouti,et al.  A simple transmit diversity technique for wireless communications , 1998, IEEE J. Sel. Areas Commun..

[9]  P. Kildal,et al.  Study of distributions of modes and plane waves in reverberation chambers for the characterization of antennas in a multipath environment , 2001 .

[10]  J.F. Valenzuela-Valdes,et al.  Diversity Gain and MIMO Capacity for Nonisotropic Environments Using a Reverberation Chamber , 2009, IEEE Antennas and Wireless Propagation Letters.