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deconvolution problem

Started by sofiyya September 23, 2009
Hi,

I have a problem with vector deconvolution. This is what I do in Matlab:

>> vect1=[1 2 3 4 5 6 7 8 9]; >> vect2=[1 2 3 4 0 0 0 0 0 0 0 0 0 0]; %I want to find w with
conv(w,vect1)=vect2
>> Lx=length(vect2)-length(vect1)+1; >> Lx2=pow2(nextpow2(Lx)); >> VECT1=fft(vect1,Lx2); >> VECT2=fft(vect2,Lx2); >> W=VECT2 ./ VECT1; >> w=real(ifft(W,Lx2)); >> w=w(1:1:Lx); >> w=w/max(abs(w)); >> conv(w,vec1) give this result
ans = Columns 1 through 9 -0.1688 -0.5065 -1.0130 -1.6883 -1.3636 -0.9740 -0.5844 -0.1948 0.1948 Columns 10 through 14 2.2727 4.5195 6.9351 9.5195 0.5844 wich is different to vect2!! Can you help me? thx
On 23 Sep, 13:24, "sofiyya" <karimae...@gmail.com> wrote:
> Hi, > > I have a problem with vector deconvolution.
...
> %I want to find w with > conv(w,vect1)=vect2
...
> wich is different to vect2!!
Do you know that a solution w actually exists that relates the input data through a convolution? Rune