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For a finite or periodic signal, as long as your FFT is long enough, the FFT contains all the information of the DTFT. The DTFT is periodic, and the FFT shows one period of the DTFT.
For a finite or periodic signal, as long as your FFT is long enough, the FFT contains all the information of the DTFT. The DTFT is periodic, and the FFT shows one period of the DTFT.
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