Howtosignalprocessing
- What the FFT analysis of a signal tells us about the signal?
- What is the main advantage of FFT?
- What is FFT spectrum analysis?
What the FFT analysis of a signal tells us about the signal?
The output of the FFT is a complex vector containing information about the frequency content of the signal. The magnitude tells you the strength of the frequency components relative to other components. The phase tells you how all the frequency components align in time.
What is the main advantage of FFT?
The main advantage of an FFT is speed, which it gets by decreasing the number of calculations needed to analyze a waveform.
What is FFT spectrum analysis?
The FFT spectrum analyzer samples the input signal, computes the magnitude of its sine and cosine components, and displays the spectrum of these measured frequency components. Why Look at a Signal's Spectrum? For one thing, some measurements which are very hard in the time domain are very easy in the frequency domain.
