New answers tagged

2

So the point is that "classically", communications theory tends to be done in complex baseband, i.e. signals centered around 0 Hz, but not necessarily symmetric in spectrum. When you want to represent such signals, you need complex values. When you want to transmit such signals over the air, you need to: convert them to digital to analog, mix the I(nphase) ...


0

I suppose you've learned about the Hilbert transform relationship between the real part and the imaginary part of the Fourier transform of a real-valued and causal signal. So you can obtain the real part from the imaginary part using this relationship. Since the imaginary part is just composed of sinusoids, the real part can be obtained very easily (note ...


Top 50 recent answers are included