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  • Research Article
  • Open Access

A High-Speed Four-Transmitter Four-Receiver MIMO OFDM Testbed: Experimental Results and Analyses

  • 1Email author,
  • 1,
  • 2,
  • 3 and
  • 2
EURASIP Journal on Advances in Signal Processing20062006:045401

  • Received: 30 November 2004
  • Accepted: 1 September 2005
  • Published:


By adopting multiple-input multiple-output (MIMO) and orthogonal frequency-division multiplexing (OFDM) technologies, indoor wireless systems could reach data rates up to several hundreds of Mbits/s and achieve spectral efficiencies of several tens of bits/Hz/s, which are unattainable for conventional single-input single-output systems. The enhancements of data rate and spectral efficiency come from the fact that MIMO and OFDM schemes are indeed parallel transmission technologies in the space and frequency domains, respectively. To validate the functionality and feasibility of MIMO and OFDM technologies, we set up a four-transmitter four-receiver OFDM testbed in a typical indoor environment, which achieves a peak data rate of 525 Mbits/s and a spectral efficiency of 19.2 bits/Hz/s. The performances including MIMO channel characteristics, bit-error rate against signal-to-noise ratio curves, the impairments of carrier frequency offset and channel estimation inaccuracy, and an asymmetric MIMO scheme are reported and analyzed in this paper.


  • Indoor Environment
  • Spectral Efficiency
  • MIMO Channel
  • Ratio Curve
  • Estimation Inaccuracy

Authors’ Affiliations

ECE Department, University of Michigan-Dearborn, 126 ELB, 4901 Evergreen Rd., Dearborn, MI 48128, USA
Communications and Networking Division, Information Technology and Telecommunications Laboratory, Georgia Tech Research Institute, Atlanta, GA 30332-0832, USA
Kiyon Company, 4225 Executive Square, Suite 290, La Jolla, CA 92037, USA


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© Xiang et al. 2006