Serial filtering using FFT

1. What is FFT filtering?
2. What is FFT based frequency domain filtering method?

What is FFT filtering?

FFT-Filter. Filtering is a process of selecting frequency components from a signal. Origin offers an FFT Filter, which performs filtering by using Fourier transforms to analyze the frequency components in the input.

What is FFT based frequency domain filtering method?

The Frequency-Domain FIR Filter block implements frequency-domain, fast Fourier transform (FFT)-based filtering to filter a streaming input signal. In the time domain, the filtering operation involves a convolution between the input and the impulse response of the finite impulse response (FIR) filter.