Partie XXVIII. Traitement du Signal

Table des matières

5. How to

How to design an elliptic filter — How to design an elliptic filter (analog and digital)

Signal — Signal manual description

analpf — create analog low-pass filter

bilt — bilinear or biquadratic transform SISO system given by a zero/poles representation

buttmag — response of Butterworth filter

casc — cascade realization of filter from coefficients

cepstrum — cepstrum calculation

cheb1mag — response of Chebyshev type 1 filter

cheb2mag — response of type 2 Chebyshev filter

chepol — Chebychev polynomial

convol — convolution

corr — correlation, covariance

cspect — two sided cross-spectral estimate between 2 discrete time signals using the correlation method

czt — chirp z-transform algorithm

detrend — remove constant, linear or piecewise linear trend from a vector

dft — discrete Fourier transform

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

fft — fast Fourier transform. — fast Fourier transform.

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

filter — filters a data sequence using a digital filter

find_freq — parameter compatibility for elliptic filter design

findm — for elliptic filter design

frfit — frequency response fit

frmag — magnitude of FIR and IIR filters

fsfirlin — design of FIR, linear phase filters, frequency sampling technique

group — group delay for digital filter

hank — covariance to hankel matrix

hilb — FIR approximation to a Hilbert transform filter

hilbert — Discrete-time analytic signal computation of a real signal using Hilbert transform

iir — iir digital filter

iirgroup — group delay Lp IIR filter optimization

iirlp — Lp IIR filter optimization

intdec — Changes sampling rate of a signal

jmat — row or column block permutation

kalm — Kalman update

lattn — recursive solution of normal equations

lattp — lattp

lev — Yule-Walker equations (Levinson's algorithm)

levin — Toeplitz system solver by Levinson algorithm (multidimensional)

lindquist — Lindquist's algorithm

mese — maximum entropy spectral estimation

mfft — multi-dimensional fft

mrfit — frequency response fit

%asn — elliptic integral

%k — Jacobi's complete elliptic integral

%sn — Jacobi 's elliptic function

phc — Markovian representation

pspect — two sided cross-spectral estimate between 2 discrete time signals using the Welch's average periodogram method.

remez — Remez exchange algorithm for the weighted chebyshev approximation of a continuous function with a sum of cosines.

remezb — Minimax approximation of magnitude response

rpem — Recursive Prediction-Error Minimization estimation

sincd — digital sinc function or Direchlet kernel

srfaur — square-root algorithm

srkf — square root Kalman filter

sskf — steady-state Kalman filter

syredi — Design of iir filters, syredi code interface

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

yulewalk — least-square filter design

zpbutt — Butterworth analog filter

zpch1 — Chebyshev analog filter

zpch2 — Chebyshev analog filter

zpell — lowpass elliptic filter