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Search: swepub > Ottersten Björn 1961 > English > (2000-2004)

  • Result 41-42 of 42
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41.
  • Yu, Kai, et al. (author)
  • Narrowband MIMO Channel Modeling for LOS Indoor Scenarios
  • 2002
  • In: Proceedings XXVIIth Triennial General Assembly of the International Union of Radio Science (URSI).
  • Conference paper (other academic/artistic)abstract
    • Herein, a line-of-sight (LOS) multiple input multiple output (MIMO) channel model is presented based on 5.2 GHzindoor MIMO channel measurements. The signal from the dominant direction is estimated and removed from the channel data. The residual part is shown to be Rayleigh distributed and its covariance matrix can be well approximated by theKronecker product of the covariance matrices seen from the transmitter and receiver respectively. Therefore we model the whole narrowband LOS indoor MIMO channel as a static rank one matrix plus a statistical model based on Rayleigh distribution with a multiplicative covariance structure.
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42.
  • Yu, Kai, et al. (author)
  • On The Error of Kronecker Structure Based MIMO Channel Model
  • 2004
  • In: Proceedings of Nordic Radio Symposium, NRS 2004.
  • Conference paper (other academic/artistic)abstract
    • Herein, we investigate the mismatch of the Kronecker structure based MIMO channel model. Finding the minimum mismatch is trivial and the result is always 0. The maximization problem, on the other hand, is not convex in general. Therefore we combine semidefinite programming with a grid search, to find a lower bound of the maximum mismatch. Numerical examples show that the bound is tight even for moderate number of points in the grid. The resulting worst case model error, is much larger than the model error previously observed in measurement campaigns, which confirms that the channel correlation matrix can, indeed, be well approximated by the Kronecker product of the correlation matrices at the transmitter and receiver for the measured NLOS indoor scenarios.
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  • Result 41-42 of 42

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