Howtosignalprocessing
- Does FFT have to be power of 2?
- Are FFTs limited to sizes that are powers of 2?
- What is radix 2 FFT algorithm?
- What are the two types of FFT?
Does FFT have to be power of 2?
Sure, you can use a radix-2 FFT to compute FFTs for lengths not a power of 2 (but it is not as efficient as using methods specifically tailored to the factors of the sequence length).
Are FFTs limited to sizes that are powers of 2?
1.6 Are FFTs limited to sizes that are powers of 2? No. The most common and familiar FFTs are “radix 2”. However, other radices are sometimes used, which are usually small numbers less than 10.
What is radix 2 FFT algorithm?
Radix-2 algorithm is a member of the family of so called Fast Fourier transform (FFT) algorithms. It computes separately the DFTs of the even-indexed inputs (x0,x2,...,xN−2) and of the odd-indexed inputs (x1,x3,...,xN−1), and then combines those two results to produce the DFT of the whole sequence.
What are the two types of FFT?
These are called the radix-2 and mixed-radix cases, respectively (and other variants such as the split-radix FFT have their own names as well).
