Hi,
Normally, this kind of delay detection is done using cross-correlation (or
some more applicable variant thereof such as MRC). Note also that a delay
will give a frequency-dependent phase shift, so you may wish to use a delay
block rather than phase shift if your signal is broadband (although I must
admit I don't know what the phase shift block does internally).
Yes you're right about the cross-correlation and I did that for my experiments where I couldn't see any relation between the maximum correlation value and the time-lag between the signals. Have attached those values (for different runs) that I noted down.
Can I know how to use these values to implement the delay block in the GRC?
Thanks.