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Optimized Excitation Signals for MIMO Frequency Response Function Measurements

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3 Author(s)
Dobrowiecki, T.P. ; Dept. of Meas. & Inf. Syst., Budapest Univ. of Technol. & Econ. ; Schoukens, Johan ; Guillaume, P.

Many different excitation signals can be chosen for the nonparametric frequency response function measurements of a linear multiple-input-multiple-output (MIMO) system. In the presence of output noise they will result in different signal-to-noise ratios (SNRs) of the frequency response function measurements. In this paper, these effects are analyzed and compared for three classes of multisine excitations: random multisines, approximately orthogonal random multisines, and orthogonal random multisines, taking also into account the crest-factor minimization. It is shown that the orthogonalization of the inputs yields an essential increase in the measured SNR

Published in:

Instrumentation and Measurement, IEEE Transactions on  (Volume:55 ,  Issue: 6 )

Date of Publication:

Dec. 2006

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