Lomb-scargle vs fft

1. What is the Speciality of Lomb scargle FFT Periodogram?
2. What is the difference between FFT and STFT?
3. Why FFT is better than DFT?
4. What is difference between FFT and DFT?

What is the Speciality of Lomb scargle FFT Periodogram?

The Lomb-Scargle periodogram is designed to detect periodic signals in unevenly spaced observations.

What is the difference between FFT and STFT?

FFT has a resolution of 2048 lines, Blackman window, and 50% overlap and STFT also has Block size 2048, FFT size 16K, Blackman window used, and 50% overlap. As we can see, STFT performs better with the same block size (but more calculated lines). We improved frequency resolution for the same amount of scooped data.

Why FFT is better than DFT?

For a sample set of 1024 values, the FFT is 102.4 times faster than the discrete Fourier transform (DFT). The basis for this remarkable speed advantage is the `bit-reversal' scheme of the Cooley-Tukey algorithm. Eliminating the burden of `degeneracy' by this means is readily understood using vector graphics.

What is difference between FFT and DFT?

Discrete Fourier Transform (DFT) is the discrete version of the Fourier Transform (FT) that transforms a signal (or discrete sequence) from the time domain representation to its representation in the frequency domain. Whereas, Fast Fourier Transform (FFT) is any efficient algorithm for calculating the DFT.