Difference between Periodogram and DTFT

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回答： Christian David 2018-10-24
Why do we use the periodogram (and not just the DTFT, for example) for the estimation of a spectrum of a random signal?

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Christian David
Christian David 2018-10-24
Hi,
The result of the DTFT is a continuous function, so it not can be determined in a computer. The alternative is DTF, which can be calculated using FFT algorithm.
Periodogram is a Power Spectral Density Estimate, so it is the square of absolute value of the DTF function.

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