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Ajuda Scilab >> Processamento de Sinais

Processamento de Sinais

  • filters
    • analpf — create analog low-pass filter
    • buttmag — Power transmission of a Butterworth filter
    • casc — cascade realization of filter from coefficients
    • cheb1mag — response of Chebyshev type 1 filter
    • cheb2mag — response of type 2 Chebyshev filter
    • chepol — Chebychev polynomial
    • convol — convolution
    • ell1mag — magnitude of elliptic filter
    • eqfir — minimax approximation of FIR filter
    • eqiir — Design of iir filters
    • faurre — filter computation by simple Faurre algorithm
    • ffilt — coefficients of FIR low-pass
    • filter — filters a data sequence using a digital filter
    • find_freq — parameter compatibility for elliptic filter design
    • frmag — magnitude of FIR and IIR filters
    • fsfirlin — design of FIR, linear phase filters, frequency sampling technique
    • group — group delay for digital filter
    • iir — iir digital filter
    • iirgroup — group delay Lp IIR filter optimization
    • iirlp — Lp IIR filter optimization
    • kalm — Kalman update
    • lev — Yule-Walker equations (Levinson's algorithm)
    • levin — Toeplitz system solver by Levinson algorithm (multidimensional)
    • lindquist — Lindquist's algorithm
    • remezb — Minimax approximation of magnitude response
    • srfaur — square-root algorithm
    • srkf — square root Kalman filter
    • sskf — steady-state Kalman filter
    • system — observation update
    • trans — low-pass to other filter transform
    • wfir — linear-phase FIR filters
    • wiener — Wiener estimate
    • wigner — 'time-frequency' wigner spectrum
    • window — compute symmetric window of various type
    • zpbutt — Butterworth analog filter
    • zpch1 — Chebyshev analog filter
    • zpch2 — Chebyshev analog filter
    • zpell — lowpass elliptic filter
  • How to
  • identification
    • lattn — recursive solution of normal equations
    • lattp — lattp
    • phc — Markovian representation
    • rpem — Recursive Prediction-Error Minimization estimation
  • miscellaneous
    • bilt — bilinear or biquadratic transform SISO system given by a zero/poles representation
    • jmat — row or column block permutation
    • sincd — digital sinc function or Direchlet kernel
  • spectral_estimation
    • corr — correlation, covariance
    • cspect — two sided cross-spectral estimate between 2 discrete time signals using the correlation method
    • czt — chirp z-transform algorithm
    • intdec — Changes sampling rate of a signal
    • mese — maximum entropy spectral estimation
    • pspect — two sided cross-spectral estimate between 2 discrete time signals using the Welch's average periodogram method.
  • transforms
    • dct — Inverse discrete cosine transform.
    • dft — discrete Fourier transform
    • dst — Inverse discrete sine transform.
    • fft — fast Fourier transform.
    • hank — covariance to hankel matrix
    • hilb — FIR approximation to a Hilbert transform filter
    • mfft — multi-dimensional fft
  • cepstrum — cepstrum calculation
  • conv — discrete 1-D convolution.
  • conv2 — discrete 2-D convolution.
  • convol2d — discrete 2-D convolution, using fft.
  • detrend — remove constant, linear or piecewise linear trend from a vector
  • fft2 — two-dimension fast Fourier transform
  • fftshift — rearranges the fft output, moving the zero frequency to the center of the spectrum
  • filt_sinc — samples of sinc function
  • frfit — frequency response fit
  • hilbert — Discrete-time analytic signal computation of a real signal using Hilbert transform
  • mrfit — frequency response fit
  • remez — Remez exchange algorithm for the weighted chebyshev approximation of a continuous function with a sum of cosines.
  • syredi — Design of iir filters, syredi code interface
  • wfir_gui — Graphical user interface that can be used to interactively design wfir filters
  • xcorr — Computes discrete auto or cross correlation
  • xcov — Computes discrete auto or cross covariance
  • yulewalk — least-square filter design
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with contributors 		Last updated:
Mon Oct 01 17:39:48 CEST 2012