Tracking of signal subspace projectors

  • Authors:
  • W. Utschick

  • Affiliations:
  • Inst. for Circuit Theor. & Signal Process., Munich Univ. of Technol.

  • Venue:
  • IEEE Transactions on Signal Processing
  • Year:
  • 2002

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Abstract

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