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  • Hjalmarsson, Håkan, 1962-, et al. (author)
  • Least-squares estimation of a class of frequency functions : A finite sample variance expression
  • 2006
  • In: Automatica. - : Elsevier BV. - 0005-1098 .- 1873-2836. ; 42:4, s. 589-600
  • Journal article (peer-reviewed)abstract
    • A new expression for the variance of scalar frequency functions estimated using the least-squares method is presented. The expression is valid for finite sample size and for a class of model structures, which includes finite impulse response, Laguerre and Kautz models, when the number of estimated parameters coincides with the number of excitation frequencies of the input. The expression gives direct insight into how excitation frequencies and amplitudes affect the accuracy of frequency function estimates. With the help of this expression, a severe sensitivity of the accuracy with respect to the excitation frequencies is exposed. The relevance of the expression when more excitation frequencies are used is also discussed.
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Type of publication
journal article (1)
Type of content
peer-reviewed (1)
Author/Editor
Hjalmarsson, Håkan, ... (1)
Ninness, B. (1)
University
Royal Institute of Technology (1)
Language
English (1)
Research subject (UKÄ/SCB)
Engineering and Technology (1)
Year
2006 (1)

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