Amplitude spectrum (transfer function) of signal?

1. What is the amplitude of a transfer function?
2. What is the amplitude spectrum of a signal?
3. What is amplitude spectrum in Fourier Transform?
4. How is amplitude calculated for FFT?

What is the amplitude of a transfer function?

The transfer function of a differentiator H(jω) = jω. Therefore the amplitude response |H(jω)| = ω. The phase is a constant 90 degrees or π/2.

What is the amplitude spectrum of a signal?

The amplitude spectrum simply gives amplitude at each frequency. The phase spectrum simply gives the phase at each frequency (Figure 2.20). Figure 2.20. (a) Amplitude spectra.

What is amplitude spectrum in Fourier Transform?

The Fourier amplitude spectrum FS(ω) is defined as the square root of the sum of the squares of the real and imaginary parts of F(ω).

How is amplitude calculated for FFT?

1) Division by N: amplitude = abs(fft (signal)/N), where "N" is the signal length; 2) Multiplication by 2: amplitude = 2*abs(fft(signal)/N; 3) Division by N/2: amplitude: abs(fft (signal)./N/2);