Group delay using cross correlation?

1. How do you find time delay using cross-correlation?
2. What is lag in cross-correlation?
3. What is cross-correlation used for?
4. Which command is used to calculate the correlation between same signal with time delay?

How do you find time delay using cross-correlation?

For delay analysis, correlation in the time domain is widely used. The correlation function plots the similarity between two signals for all possible lags τ. The peak of the correlation function occurs at the lag with the best similarity between the two signals, i.e. the estimated delay.

What is lag in cross-correlation?

The lag refers to how far the series are offset, and its sign determines which series is shifted. Note that as the lag increases, the number of possible matches decreases because the series “hang out” at the ends and do not overlap.

What is cross-correlation used for?

Cross-correlation is used to evaluate the similarity between the spectra of two different systems, for example, a sample spectrum and a reference spectrum. This technique can be used for samples where background fluctuations exceed the spectral differences caused by changes in composition.

Which command is used to calculate the correlation between same signal with time delay?

The finddelay function uses the xcorr function to determine the cross-correlation between each pair of signals at all possible lags specified by the user.