The Asymptotic Variance of Subspace Estimates

نویسندگان

  • ALESSANDRO CHIUSO
  • GIORGIO PICCI
چکیده

We give new simple general expressions for the asymptotic covariance of the estimated system parameters (A,B,C,D) in subspace identification. The formulas can be applied to a whole class of subspace methods including N4SID, MOESP, CVA etc. The asymptotic expressions highlight how the conditioning of the estimation problem influences the accuracy of the estimates. Journal of Economic Literature Classification: C49, C59.

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تاریخ انتشار 2003