Tracking of signal subspace projectors

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30 Scopus citations


A new subspace tracking approach that directly operates on the projection matrix onto the signal subspace instead of tracking its unitary eigenbasis is proposed. Therefore, the difficulties arising from introducing a calculus on the manifold of projection matrices are overcome by a proper parameterization of the projectors. Simulation results are presented from the field of angular frequency retrieval in array signal processing.

Original languageEnglish
Pages (from-to)769-778
Number of pages10
JournalIEEE Transactions on Signal Processing
Issue number4
StatePublished - Apr 2002


  • DSP implementation
  • Parameterization
  • Projection matrices
  • Steepest descent optimization
  • Subspace tracking
  • Unitary rotations


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