MATLAB: Fft operation

autogaindigital signal processingfft operationfilterMATLAB

please give me some examples related to fft operation.

i want to make such program that sound signal will be amplified according to the user input frequencies and related gain.

please give me some idea.

Best Answer

Hi Priyank, I think you should design an appropriate filter that selects a passband and applies a gain to that passband.

Related Solutions

MATLAB: Apply filter to sound

Not sure why you want to apply both the Hamming window and use the Butterworth filter. But say you have the Butterworth filter as coefficients B and A, then use:

output = filter(B,A,input);

If you have the Butterworth filter as a filter object, Hd,

    output = filter(Hd,input);

If you wanted to apply the Hamming window before you filter,

      output = filter(B,A,input.*hamming(length(input)));

After filtering,

        output = output.*hamming(length(output));

MATLAB: FFT

Then you just do

 t = 0:0.001:1-0.001;
 I = cos(2*pi*100*t);
 Q = sin(2*pi*100*t);
 sig1 = I+1j*Q;
 dftsig1 = fft(sig1);

Do the same for I2 and Q2, etc.

Best Answer

Related Solutions

MATLAB: Apply filter to sound

MATLAB: FFT

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