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Sinc Prototype Filter design

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Tuncay Eren
Tuncay Eren 2018-1-17
评论： Tuncay Eren 2018-1-18
Hello,
Could you please help me in the following sinc filter design?
% numFFT = 1024; % Number of FFT points
%toneOffset = 2.5; % Tone offset or excess bandwidth (in subcarriers)
%L = 513; % Filter length (=filterOrder+1), odd
%numDataCarriers = 600; % number of data subcarriers in subband
%halfFilt = floor(L/2);
%n = -halfFilt:halfFilt;
% Sinc function prototype filter
%pb = sinc((numDataCarriers+2*toneOffset).*n./numFFT);
1-What is the meaning of (numDataCarriers+2*toneOffset) in this sinc function?How it is interpreted in time and frequency domains?
2-Why it is devided by the FFT length numFFT?
3-What are the sampling period, sampling rate,sampling frequency with this filter design?
4-Why we add 2*toneOffset in to this prototype design?
Thanks in advance!

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回答（1 个）

Abhishek Ballaney
Abhishek Ballaney 2018-1-18
https://in.mathworks.com/help/signal/ref/sinc.html
  1 个评论
Tuncay Eren
Tuncay Eren 2018-1-18
thanks Ahishek but I don't understand what that code (in your link) says as well. I would be glad if you could help for above code. thanks

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