How to choose a FFT algorithm?

1. What are different types of FFT algorithms?
2. How do I choose a FFT window?
3. Which are the two algorithms in FFT?
4. What is the need for FFT algorithm?

What are different types of FFT algorithms?

A large number of FFT algorithms have been developed over the years, notably the Radix-2, Radix-4, Split- Radix, Fast Hartley Transform (FHT),, Quick Fourier Transform (QFT),, and the Decimation-in-Time-Frequency (DITF), algorithms.

How do I choose a FFT window?

The FFT window size is typically a power of 2. If your sampling rate is 44,100 samples per second, then a window size of 32 samples is about 0.0007 s, and a window size of 65536 is about 1.486 s. There's a tradeoff in the choice of window size.

Which are the two algorithms in FFT?

There are two main families of FFT algorithms: the Cooley-Tukey algorithm and the Prime Factor algorithm.

What is the need for FFT algorithm?

The FFT algorithm is heavily used in many DSP applications. It is used whenever the signal needs to be processed in the spectral or frequency domain. Because it is so efficient to implement, sometimes even FIR filtering functions are performed using an FFT.