Howtosignalprocessing
- What does magnitude of FFT tell you?
- What is FFT phase spectrum?
- What does the amplitude of FFT mean?
- What is phase in Fourier transform?
What does magnitude of FFT tell you?
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 FFT phase spectrum?
The FFT function computes the complex DFT and the hence the results in a sequence of complex numbers of form . The amplitude spectrum is obtained. For obtaining a double-sided plot, the ordered frequency axis (result of fftshift) is computed based on the sampling frequency and the amplitude spectrum is plotted.
What does the amplitude of FFT mean?
The amplitude of the FFT is related to the number of points in the time-domain signal. Use the following equation to compute the amplitude and phase versus frequency from the FFT. where the arctangent function here returns values of phase between –π and +π, a full range of 2π radians.
What is phase in Fourier transform?
The phase of a signal generally refers to the timing of the signal (or how two sinusoids line up) as you posted in your question. But you are asking about the phase of a signal in the frequency domain (i.e., after an FFT operation). The FFT function computes an N-point complex DFT.
