Analysis of A Simplified Channel Estimator for MIMO Frequency Selective Channels

Pei Xiao*, Mathini Sellathurai

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


Channel estimation for multiple-input, multipleoutput (MIMO) systems is studied in this paper. In particular, we present a simplified MIMO channel estimator based on orthogonal design. The performance of the proposed scheme is theoretically analyzed and compared to that of the optimum maximum likelihood estimator. The effect of non-orthogonality of the training sequences is investigated. Some modifications of the proposed estimator with sample stacking and averaging are introduced to further improve the estimation performance. This simplified scheme is evaluated in the context of the WiMAX MIMO systems in terms of mean square error for the channel estimation and bit error rate for the space-time turbo equalization. Both analytical and simulation results indicate that despite of its low computational complexity, this simplified estimator leads to minimum variance unbiased estimation and achieves identical performance to that of the maximum likelihood estimator.

Original languageEnglish
Title of host publication67th IEEE Vehicular Technology Conference-Spring 2008
Number of pages6
ISBN (Print)9781424416448
Publication statusPublished - 20 May 2008
Event67th IEEE Vehicular Technology Conference-Spring 2008 - Marina Bay, Singapore
Duration: 11 May 200814 May 2008


Conference67th IEEE Vehicular Technology Conference-Spring 2008
Abbreviated titleVTC2008
CityMarina Bay


  • Channel estimation
  • Frequency-selective fading channels
  • MIMO
  • Space-time codes

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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