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Aide de Scilab >> Traitement du Signal

Traitement du Signal

  • Convolution - intercorrélation
    • convdiscrete 1-D convolution.
    • conv2discrete 2-D convolution.
    • convolconvolution
    • convol2ddiscrete 2-D convolution, using fft.
    • corrcorrelation, covariance
    • hankcovariance to hankel matrix
    • xcorrComputes discrete auto or cross correlation
  • Filtrage
    • How to design an elliptic filterHow to design an elliptic filter (analog and digital)
    • analpfcreate analog low-pass filter
    • buttmagPower transmission of a Butterworth filter
    • casccascade realization of filter from coefficients (utility function)
    • cheb1magresponse of Chebyshev type 1 filter
    • cheb2magresponse of type 2 Chebyshev filter
    • ell1magmagnitude of elliptic filter
    • eqfirminimax approximation of FIR filter
    • eqiirDesign of iir filters
    • faurrefilter computation by simple Faurre algorithm
    • ffiltcoefficients of FIR low-pass
    • filt_sincsamples of sinc function
    • filterfilters a data sequence using a digital filter
    • find_freqparameter compatibility for elliptic filter design
    • frmagmagnitude of FIR and IIR filters
    • fsfirlindesign of FIR, linear phase filters, frequency sampling technique
    • groupgroup delay for digital filter
    • hilbertDiscrete-time analytic signal computation of a real signal using Hilbert transform
    • iiriir digital filter
    • iirgroupgroup delay Lp IIR filter optimization
    • iirlpLp IIR filter optimization
    • kalmKalman update
    • levYule-Walker equations (Levinson's algorithm)
    • levinToeplitz system solver by Levinson algorithm (multidimensional)
    • lindquistLindquist's algorithm
    • remezRemez exchange algorithm for the weighted chebyshev approximation of a continuous function with a sum of cosines.
    • remezbMinimax approximation of magnitude response
    • srfaursquare-root algorithm
    • srkfsquare root Kalman filter
    • sskfsteady-state Kalman filter
    • syrediDesign of iir filters, syredi code interface
    • systemobservation update
    • translow-pass to other filter transform
    • wfirlinear-phase FIR filters
    • wfir_guiGraphical user interface that can be used to interactively design wfir filters
    • wienerWiener estimate
    • wigner'time-frequency' wigner spectrum
    • windowcompute symmetric window of various type
    • yulewalkleast-square filter design
    • zpbuttButterworth analog filter
    • zpch1Chebyshev analog filter
    • zpch2Chebyshev analog filter
    • zpelllowpass elliptic filter
  • How To
    • Identification
      • frfitfrequency response fit
      • lattnrecursive solution of normal equations
      • lattpIdentification of MA part of a vector ARMA process
      • mrfitfrequency response fit
      • phcMarkovian representation
      • rpemRecursive Prediction-Error Minimization estimation
    • Estimation Spectrale
      • cepstrumcepstrum calculation
      • cspecttwo sided cross-spectral estimate between 2 discrete time signals using the correlation method
      • cztchirp z-transform algorithm
      • mesemaximum entropy spectral estimation
      • pspecttwo sided cross-spectral estimate between 2 discrete time signals using the Welch's average periodogram method.
    • Tranformées
      • idctInverse discrete cosine transform.
      • idstInverse discrete sine transform.
      • ifftTransformée de Fourier discrète rapide inverse.
      • fft2two-dimension fast Fourier transform
      • fftshiftrearranges the fft output, moving the zero frequency to the center of the spectrum
      • hilbFIR approximation to a Hilbert transform filter
      • ifftshiftinverse de fftshift
    • biltbilinear or biquadratic transform SISO system given by a zero/poles representation
    • detrendremove constant, linear or piecewise linear trend from a vector
    • intdecChanges sampling rate of a signal
    • sincddigital sinc function or Dirichlet kernel
    • xcovComputes discrete auto or cross covariance
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    Last updated:
    Thu Feb 14 14:59:55 CET 2019