How can i get the frequency response from this code:

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codefanta 2019-3-8

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/448916-how-can-i-get-the-frequency-response-from-this-code

回答： Pranjal Priyadarshi 2019-3-14

采纳的回答： Pranjal Priyadarshi

close all; clc;

load('whitenoize.mat'); %generated white noise

load('whitenoiserec.mat'); %recorded white nosie

x = orgwhite(20000:50000); % extract the white noise part only

y = recwhite(20000:50000)'; % extract the corresponding response to white noise part

h2 = ifft(fft(y)./fft(x)); %to get impulse response

plot(abs(h2));

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Answer 1

Pranjal Priyadarshi 2019-3-14

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https://ww2.mathworks.cn/matlabcentral/answers/448916-how-can-i-get-the-frequency-response-from-this-code#answer_365296

Frequency response uses an FFT-based algorithm to calculate the Z-transform frequency response of a digital filter. The function “freqz” can be used to find the frequency response. In the simplest form “freqz” accepts the filter coefficient vectors b and a and integer p specifying the number of points at which to calculate the frequency response. For more information on frequency response the following document can be followed:

https://www.mathworks.com/help/signal/ug/frequency-response.html