Comparing multiple signals for similarity

1. How do you compare similarity of two signals?
2. Is the measure of similarity between two different signals?
3. How do you know if two signals are correlated?
4. How do you find the difference between two signals?

How do you compare similarity of two signals?

For measuring the similarity between two temporal signals, you can try using Dynamic Time Warping (DTW). DTW constructs a distance matrix between the two signals and tries to find minimum distance the two signals. If the two signals are identical, then distance is zero.

Is the measure of similarity between two different signals?

Cross-correlation is a measure of similarity between two signals.

How do you know if two signals are correlated?

In words, we compute a correlation by multiplying two signals together and then summing the product. The result is a single number that indicates the similarity between the signals x[n] and y[n]. What values can C(x, y) take on, and what does this tell us about the signals x[n] and y[n]?

How do you find the difference between two signals?

function [ diff ] = FindDiff( signal1, signal2 ) %FINDDIFF Finds the difference between two signals of equal frequency %after an appropritate time shift is applied % Calculates the time shift between two signals of equal frequency % using cross correlation, shifts the second signal and subtracts the % shifted signal ...