Fft of complex signal matlab

1. What is the FFT of a complex number?
2. How do you create a complex signal in MATLAB?
3. How to write FFT code in MATLAB?

What is the FFT of a complex number?

The FFT provides you with amplitude and phase. The amplitude is encoded as the magnitude of the complex number (sqrt(x^2+y^2)) while the phase is encoded as the angle (atan2(y,x)). To have a strictly real result from the FFT, the incoming signal must have even symmetry (i.e. x[n]=conj(x[N-n])).

How do you create a complex signal in MATLAB?

y = imag(complexSignal); plot(x, y, 'bo-', 'LineWidth', 2);

How to write FFT code in MATLAB?

F = fft(f, n)

This form of the command is to compute DFT (Discrete Fourier Transform) of 'f' using a FFT (Fast Fourier Transform) algorithm and results the frequency domain n-point DFT signal 'F'. BY default F possess same size as that of f.