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A comparison of DFT and SVD based channel estimation in MIMO OFDM systems

Publiceringsår: 2006
Språk: Engelska
Publikation/Tidskrift/Serie: 2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No. 06TH8881)
Dokumenttyp: Konferensbidrag
Förlag: IEEE--Institute of Electrical and Electronics Engineers Inc.


In this paper two simplified transform based estimators for MIMO OFDM systems using the DFT and an SVD based transform are compared over a tapped delay line channel model. In the resulting symbol error rate plots, it is seen that the DFT based estimator experiences an error floor caused by the mismatch between the discrete time model and a continuous time reality. This error floor becomes a problem at high SNR levels where high data-rate systems can be expected to operate. When using an SVD based estimator it is seen that this error floor is reduced at the cost of a somewhat increased estimator complexity


  • Electrical Engineering, Electronic Engineering, Information Engineering
  • symbol error rate
  • tapped delay line channel model
  • orthogonal frequency division multiplexing
  • multiple input multiple output systems
  • MIMO OFDM systems
  • singular value decomposition
  • SVD based channel estimation
  • DFT based channel estimation
  • discrete Fourier transform
  • SNR
  • signal-to-noise ratio
  • high data-rate systems
  • discrete time model
  • continuous time reality


2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications
  • ISBN: 1-4244-0329-4

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