Signal(1)

NAME
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 fourier transform

hilb
    : Hilbert transform centered 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

MISCELLANOUS

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