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

  • Weidong XiangEmail author
  • Paul Richardson
  • Brett Walkenhorst
  • Xudong Wang
  • Thomas Pratt
Open Access
Research Article
Part of the following topical collections:
  1. Implementation Aspects and Testbeds for MIMO Systems


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 


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Copyright information

© Xiang et al. 2006

Authors and Affiliations

  • Weidong Xiang
    • 1
    Email author
  • Paul Richardson
    • 1
  • Brett Walkenhorst
    • 2
  • Xudong Wang
    • 3
  • Thomas Pratt
    • 2
  1. 1.ECE DepartmentUniversity of Michigan-DearbornDearbornUSA
  2. 2.Communications and Networking Division, Information Technology and Telecommunications LaboratoryGeorgia Tech Research InstituteAtlantaUSA
  3. 3.Kiyon CompanyLa JollaUSA

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