Correlation and ratio between two signals?

1. How do you calculate the correlation between two signals?
2. Why do we need a correlation between two signals?
3. What is meant by correlation of signals?
4. What is the use of correlation in signals and systems?

How do you calculate the correlation between two signals?

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].

Why do we need a correlation between two signals?

That is, correlation between signals indicates the measure up to which the given signal resembles another signal. In other words, if we want to know how much similarity exists between the signals 1 and 2, then we need to find out the correlation of Signal 1 with respect to Signal 2 or vice versa.

What is meant by correlation of signals?

The correlation of two functions or signals or waveforms is defined as the measure of similarity between those signals.

What is the use of correlation in signals and systems?

It is used in Radars, digital communication and mobile communication etc. The main application of correlation is that the incoming/received signal is correlated with the standard signals and a signal of this set which has maximum correlation with the incoming/received signal is only detected.