Is there any known math equation or other method to perform phase rotation on signal without decomposing it to frequency domain?
In frequency domain it is obvious. You just need to perform phase shift for each frequency. But decomposing signal from time domain to freq domain, then perform phase shift on each frequency, then again composing it to time domain it is very computationally demanding for frequency-rich signal.
That's why I wonder if I can achieve it without decomposing signal to frequency domain?
To be clear I want to perform on the signal something like that:
But I don't know the frequencies in the signal. I just have time domain signal. Is that possible?