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How can I design quantizer with MATLAB?

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laperla

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Hi
How can I design a 10-bit quantizer function that gets a
vector of decision levels errors?
 

you could just use the floor function:

y=floor(511*x)+511;

where x is your analog signal between [-1, +1] and y is your quantized signal between [0 and 1024] in this case.
 
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    laperla

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    rezazarei

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I want to write MATLAB program for design 10-bit quantizer function
Then write funcion for caculate IND and DNL
 
Well, the quantizer in my previous post is ideal so the DNL/INL will also be ideal.

If you want a "less" ideal quantizer you could implement a flash type as:
ref=[-512:511]/512;
fs=1e6; % sampling rate
f=31*fs/8192; input frequency, 31 is an odd number for coherent sampling, 8192 is the number of samples
x=sin(2*pi*f*(0:8191)/fs); % the input signal
for ii=1:8192
y(ii)=sum(x(ii)>ref); % the quantizer
end
plot(y)
then, using some immagination, you can add your non-linearities to the reference and see what happens to the DNL/INL
 

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