I'm new to signal processing.
Could somebody explain to me what are the benefits and reasons for decomposing a signal into real and especially imaginary parts?
I'm looking at the hilbert transform in matlab. Matlal hilbert transform
The imaginary part is a version of the original real sequence with a 90° phase shift. What exactly is a phase shift of 90 degrees.
For example if I have a data sequence of [100, 100, 200, 100, 200], how are the imaginary parts calculated? How do you phase shift 90 degrees?