Man Scilab

Signal
Scilab Function

Signal - Signal manual description

Filters

  • analpf : analog low-pass filter
  • buttmag : squared magnitude response of a Butterworth filter
  • casc : creates cascade realization of filter
  • cheb1mag : square magnitude response of a type 1 Chebyshev filter
  • cheb2mag : square magnitude response of a type 1 Chebyshev filter
  • chepol : recursive implementation of Chebychev polynomial
  • convol : convolution of 2 discrete series
  • ell1 mag : squared magnitude of an elliptic filter
  • eqfir : minimax multi-band, linear phase, FIR filter
  • eqiir : design of iir filter
  • faurre : optimal lqg filter.
  • lindquis : optimal lqg filter lindquist algorithm
  • ffilt : FIR low-pass,high-pass, band-pass, or stop-band filter
  • filter : compute the filter model
  • find_freq : parameter compatibility for elliptic filter design
  • findm : for elliptic filter design
  • frmag : magnitude of the frequency responses of FIR and IIR filters.
  • fsfirlin : design of FIR, linear phase (frequency sampling technique)
  • fwiir : optimum design of IIR filters in cascade realization,
  • iir : designs an iir digital filter using analog filter designs.
  • iirgroup : group delay of iir filter
  • iirlp : Lp IIR filters optimization
  • group : calculate the group delay of a digital filter
  • optfir : optimal design of linear phase filters using linear programming
  • remezb : minimax approximation of a frequency domain magnitude response.
  • kalm : Kalman update and error variance
  • lev : resolve the Yule-Walker equations :
  • levin : solve recursively Toeplitz system (normal equations)
  • srfaur : square-root algorithm for the algebraic Riccati equation.
  • srkf : square-root Kalman filter algorithm
  • sskf : steady-state Kalman filter
  • system : generates the next observation given the old state
  • trans : transformation of standardized low-pass filter into low-pass, high-pass, band-pass, stop-band.
  • wfir : linear-phase windowed FIR low-pass, band-pass, high-pass, stop-band
  • wiener : Wiener estimate (forward-backward Kalman filter formulation)
  • wigner : time-frequency wigner spectrum of a signal.
  • window : calculate symmetric window
  • zpbutt : Butterworth analog filter
  • zpch1 : poles of a type 1 Chebyshev analog filter
  • zpch2 : poles and zeros of a type 2 Chebyshev analog filter
  • zpell : poles and zeros of prototype lowpass elliptic filter
  • Spectral estimation

  • corr : correlation coefficients
  • cspect : spectral estimation using the modified periodogram method.
  • czt : chirp z-transform algorithm
  • intdec : change the sampling rate of a 1D or 2D signal
  • mese : calculate the maximum entropy spectral estimate
  • pspect : auto and cross-spectral estimate
  • wigner : Wigner-Ville time/frequency spectral estimation
  • Transforms

  • dft : discrete Fourier transform
  • fft : fast flourier transform
  • hilb : Hilbert transform centred around the origin.
  • hank : hankel matrix of the covariance sequence of a vector process
  • mfft : fft for a multi-dimensional signal
  • Identification

  • lattn,lattp : recursive solution of normal equations
  • phc : State space realisation by the principal hankel component approximation method,
  • rpem : identification by the recursive prediction error method
  • Miscellaneous

  • lgfft : computes p = ceil (log_2(x))
  • sinc : calculate the function sin(2*pi*fl*t)/(pi*t)
  • sincd : calculates the function Sin(N*x)/Sin(x)
  • %k : Jacobi's complete elliptic integral
  • %asn : .TP the elliptic integral :
  • %sn : Jacobi 's elliptic function with parameter m
  • bilt : bilinear transform or biquadratic transform.
  • jmat : permutes block rows or block columns of a matrix
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