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).

在 Help Center 和 File Exchange 中查找有关 Discrete Fourier and Cosine Transforms 的更多信息

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