Wireless Personal Communications

, Volume 46, Issue 1, pp 83–98 | Cite as

A Novel Environment Characterization Metric for Clustered MIMO Channels

Used to Validate a SAGE Parameter Estimator
  • Nicolai Czink
  • Giovanni Del Galdo
  • Xuefeng Yin
  • Ernst Bonek
  • Juha Ylitalo
Article

Abstract

In this work we introduce a novel metric for characterizing the double-directional propagation environment and use this metric to assess the performance of a SAGE parameter estimator for MIMO channels. Using the IlmProp, a geometry-based MIMO channel modeling tool, we construct synthetic channels for three different scenarios showing: (i) well separated clusters containing dense propagation paths, and single-bounce scattering; (ii) partly overlapping clusters containing widely spread propagation paths, and single-bounce scattering; (iii) unclustered multipath components (“rich scattering”), and double-bounce-only scattering. We model the scatterers and the receiver in the environment as fixed, but the transmitter as moving. The Initialization and Search-Improved SAGE (ISIS) estimation tool is used to extract the propagation paths from the constructed channels. Both true and estimated paths are fed to the new system-independent metric which genuinely reflects the structure of the channel and the compactness of the propagation paths. We use this metric to decide on the accuracy of the channel estimator. The results show a convincing agreement between true and estimated paths.

Keywords

MIMO channel Performance metrics Clustering 

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Copyright information

© Springer Science + Business Media LLC 2007

Authors and Affiliations

  • Nicolai Czink
    • 1
    • 4
  • Giovanni Del Galdo
    • 2
  • Xuefeng Yin
    • 3
  • Ernst Bonek
    • 4
  • Juha Ylitalo
    • 5
  1. 1.Telecommunications Research Center Vienna (ftw.)ViennaAustria
  2. 2.Communications Research LaboratoryIlmenau University of TechnologyIlmenauGermany
  3. 3.Department of Electronics SystemsAalborg UniversityAalborgDenmark
  4. 4.Institute of Communications and Radio-Frequency EngineeringVienna University of TechnologyViennaAustria
  5. 5.ElektrobitOuluFinland

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