I want to compute FFT of each segments from a 102400 length signal, where I consider the length of segment is 1024. Than store the amplitude and freq n separate array

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Rajeev Kumar 2022-10-11

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编辑： Matt J 2022-10-11

I want to compute FFT of each segments from a 102400 length signal, where I consider the length of segment is 1024. Than store the amplitude and freq n separate array?

Data file is attached and store in v1.

I tried the below code :

requiredArray = [];
meanRequiredArray = [];
sum = 0;
count = 1;
for k = v1
    requiredArray = [requiredArray, k];
    disp(requiredArray);
    
    if numel(requiredArray) == 3
        meanRequiredArray = [meanRequiredArray, (abs(fft(requiredArray)))];
        requiredArray = [];
    end
    
    disp(numel(requiredArray));
    
end
SA= meanRequiredArray';

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Rajeev Kumar 2022-10-11

Yes... stored Phase in seperate array

Matt J 2022-10-11

编辑：Matt J 2022-10-11

Then I think I have given you a valid answer below.

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回答（1 个）

Matt J 2022-10-11

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1822143-i-want-to-compute-fft-of-each-segments-from-a-102400-length-signal-where-i-consider-the-length-of-s#answer_1071238

编辑：Matt J 2022-10-11

在 MATLAB Online 中打开

F=fft( reshape(input,1024,[])  ,[],1);
amplitude=abs(F);
phase=angle(F);

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MATLAB Mathematics Fourier Analysis and Filtering

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