So it's widely known that the Cross Correlation of 2 signals helps us in figuring out the time delay in those signals by analyzing the peak of the correlation coefficient in the time domain.
For something I am working on, due to a short baseline in comparison to the wavelength of the signal in between two of my receivers, the cross correlation of the signals from my two sensors give a peak at zero which makes it hard for me to analyse them.
Which is what brings me to my original question i.e What if I analyse the fft of this correlation coefficient array? Will I find anything hinting towards the time delay?
If not, is there anyway to figure out how I can find the time delay with such a short baseline (~50m) for a long wavelength (~20km) signal? Thanks for the help. Any little help would be appreciated.