Scilab 5.3.0
- Manuel Scilab
- Traitement du Signal
- How to
- Signal
- analpf
- bilt
- buttmag
- casc
- cepstrum
- cheb1mag
- cheb2mag
- chepol
- convol
- corr
- cspect
- czt
- detrend
- dft
- ell1mag
- eqfir
- eqiir
- faurre
- ffilt
- fft
- fft2
- fftshift
- filt_sinc
- filter
- find_freq
- findm
- frfit
- frmag
- fsfirlin
- group
- hank
- hilb
- hilbert
- iir
- iirgroup
- iirlp
- intdec
- jmat
- kalm
- lattn
- lattp
- lev
- levin
- lindquist
- mese
- mfft
- mrfit
- %asn
- %k
- %sn
- phc
- pspect
- remez
- remezb
- rpem
- sincd
- srfaur
- srkf
- sskf
- syredi
- system
- trans
- wfir
- wiener
- wigner
- window
- yulewalk
- zpbutt
- zpch1
- zpch2
- zpell
Please note that the recommended version of Scilab is 2025.0.0. This page might be outdated.
See the recommended documentation of this function
czt
chirp z-transform algorithm
Calling Sequence
[czx]=czt(x,m,w,phi,a,theta)
Arguments
- x
input data sequence
- m
czt is evaluated at
mpoints in z-plane- w
magnitude multiplier
- phi
phase increment
- a
initial magnitude
- theta
initial phase
- czx
chirp z-transform output
Description
chirp z-transform algorithm which calcultes the z-transform on a
spiral in the z-plane at the points
[a*exp(j*theta)][w^kexp(j*k*phi)] for
k=0,1,...,m-1.
Examples
a=.7*exp(%i*%pi/6); [ffr,bds]=xgetech(); //preserve current context rect=[-1.2,-1.2*sqrt(2),1.2,1.2*sqrt(2)]; t=2*%pi*(0:179)/179;xsetech([0,0,0.5,1]); plot2d(sin(t)',cos(t)',[2],"012",' ',rect) plot2d([0 real(a)]',[0 imag(a)]',[3],"000") xsegs([-1.0,0;1.0,0],[0,-1.0;0,1.0]) w0=.93*exp(-%i*%pi/15);w=exp(-(0:9)*log(w0));z=a*w; zr=real(z);zi=imag(z); plot2d(zr',zi',[5],"000") xsetech([0.5,0,0.5,1]); plot2d(sin(t)',cos(t)',[2],"012",' ',rect) plot2d([0 real(a)]',[0 imag(a)]',[-1],"000") xsegs([-1.0,0;1.0,0],[0,-1.0;0,1.0]) w0=w0/(.93*.93);w=exp(-(0:9)*log(w0));z=a*w; zr=real(z);zi=imag(z); plot2d(zr',zi',[5],"000") xsetech(ffr,bds); //restore context
Authors
C. Bunks
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