how do i convert time domain signal to frequency domain signal?

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Heartrin 2015-12-7

评论： Mohammad Abouali 2015-12-8

I have a sensor data signal of lenth 4000*1.

It is time domain.

How can i convert it into frquency domain.

Any commands in MAtlab doing this conversion.

Please Help.

Mohammad Abouali 2015-12-7

fft() is one

Heartrin 2015-12-7

编辑：Heartrin 2015-12-7

I knew what FFT is.

i was using transfer functions matrix methods to convert it.

just for clarification i want to make sure that this works correct.

Mohammad Abouali 2015-12-8

Yes, FFT or Fast Fourier Transform converts the signal from the (usually) time domain to the frequency domain.

ifft() performs the inverse, i.e. moving from freq. domain to time domain (usually).

MATLAB Mathematics Fourier Analysis and Filtering

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