Linear Approximation of Weakly Nonlinear MIMO Systems

Tadeusz Dobrowiecki, Joannes Schoukens

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


A nonlinear multiple-intput-multiple-output (MIMO) Volterra system, measured with random multisine signals, can be replaced by an approximating linear MIMO system followed by nonlinear-noise sources. This approximation is a straightforward extension of the approximation to single-input-single-output Volterra systems. For a two-input-two-output cubic system, an optimized measurement strategy is also proposed to reduce as much as possible the influence of nonlinear noise on the measurement of the nonparametric frequency-response function.
Original languageEnglish
Pages (from-to)887-894
Number of pages8
JournalIEEE Transactions on Instrumentation and Measurement
Publication statusPublished - 1 Jun 2007


  • nonlinear systems


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