Is it possible to find time delay of arrival using demodulated signals (of bandwidth ~200hz)? I have a setup in which I receive (multiple receivers, of course) modulated signal from a source. I want to find the angle of arrival of the signal. The signal is amplitude modulated. Due to hardware limitations, cross correlation of the raw data is not yielding good results. So I want to demodulate the signal, and then perform cross correlation using the demodulated ones. Will it yield good results? I googled it a bit and I can only find correlation calculations being done on the raw data. I was wondering that the raw data would consist of lot of noise and interference. So why not demodulate the data and then find cross correlation at least when the signals are analog modulated?