adaptive noise cancelling Advanced AIC, the Akaike Information Criterion Akaike's Final Prediction Error (FPE) AR model ARARMAX structure ARMAX ARMAX model ARMAX structure ARX ARX model ARX model ARX model ARX model ARX model ARX model ARX model basic tools BJ Bode diagram Bode plot Box-Jenkins (BJ) structure Box-Jenkins model Burg's method communication window ident comparisons using compare 3-51 complex-valued data confidence interval conventions in our documentation (table) correlation analysis correlation analysis correlation analysis covariance function covariance matrix covariance matrix suppressing calculation covariance method creating models from data cross correlation function cross correlation function cross spectrum customized plots CVA data channels feedback iddata object iddata object multiple experiments representation Data Board data handling checklist data representation data representation data views delays delays delays detrending the data difference equation disturbance disturbance spectra drift matrix dynamic models, introduction empirical transfer function estimate estimation parametric estimation data estimation method instrumental variables nonparametric parametric prediction error approach prediction error approach subspace method estimation methods direct parametric exporting to the MATLAB workspace extended least squares (ELS) fault detection feedback feedback in data FixedParameter focus focus frequency function functions functions plots range response scales frequency domain description frequency response frequency response frequency response Gauss-Newton direction Gauss-Newton minimization geometric lattice method graphical user interface (GUI) greybox-modelling GUI topics Hamming window idarx model object ident window identification method subspace identification process, basic steps idfrd model object idgrey model object idpoly model object idss model object importing data into the GUI impulse response impulse response impulse response impulse response Information Theoretic Criterion (AIC) initial condition initial parameter values initial state in GUI state space model innovations form innovations form input signals instrumental variable (IV) method technique iterative search iterative search Kalman gain Kalman gain lag widow lag window layout least squares Levenberg-Marquard LimitError main ident window maximum likelihood criterion method MaxIter MaxSize memory horizon merge experiments model nonparametric output-error parametric properties set state-space structure structure structure structure selection uncertainty view functions views views Model Board model order model structure model uncertainty model validation model views MOESP multi-output models criterion Multiple experiments multivariable ARX model multivariable systems multivariable systems N4Horison N4Horizon N4Weight na,nb,nc,nd,nf parameter definitions noise noise model noise source noise source noise-free simulation noise-free simulations nonequal sampling nonparametric estimation nonparametric identification Normalized Gradient (NG) Approach numerical differentiation Nyquist plot OE OE model offsets order editor outliers signals output error model output signals Output-Error model output-error model output-error model output-error model state space model parametric identification parametric model parametric model estimation periodogram pole poles poorly damped systems prediction error identification error method prediction error prediction horizon preferences in GUI prefiltering prefiltering signals Quickstart menu item recursive identification identification parameter estimation references list resampling residual analysis residual analysis residuals residuals robustification sampling interval sampling interval SearchDirection selecting data ranges Sessions shift operator shift operator simulating data spectral analysis spectral analysis spectral analysis spectrum spectrum spectrum spectrum startup identification procedure state space model continuous time continuous time innovations form output-error model stochastic state variables state vector state-space model state-space model state-space models step response step response structure structure matrices subspace method subspace method time delay time domain description time series model time series model time-continuous systems Tolerance trace trace transfer function transfer function transient response transient response uncertainty suppressing calculation Unnormalized Gradient (UG) Approach validation data validation data validation data white noise white noise window sizes working data Working Data set Yule-Walker approach zero zeros