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convol.7
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1999-09-16
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convol(1) Scilab Function convol(1)
NAME
convol - convolution
CALLING SEQUENCE
[y]=convol(h,x)
[y,e1]=convol(h,x,e0)
PARAMETERS
x,h :input sequences (h is a "short" sequence, x a "long" one)
e0 : old tail to overlap add (not used in first call)
y : output of convolution
e1 : new tail to overlap add (not used in last call)
DESCRIPTION
calculates the convolution y= h*x of two discrete sequences by using the
fft. Overlap add method can be used.
USE OF OVERLAP ADD METHOD: For x=[x1,x2,...,xNm1,xN] First call is
[y1,e1]=convol(h,x1); Subsequent calls : [yk,ek]=convol(h,xk,ekm1); Final
call : [yN]=convol(h,xN,eNm1); Finally y=[y1,y2,...,yNm1,yN]
SEE ALSO
corr,fft,pspec and polynomial product.
AUTHOR
F. D , C. Bunks Date 3 Oct. 1988