A newbie here. Application of Wavelet Transform for Pattern Recognition.

May I ask, is it possible to use wavelet transform for pattern recognition?

say, I have an original signal (S1) and I would like to use this as basis.

then, I generated two other signals namely S2 and S3.

I would like compare S2 and S3 to S1, and determine if whether the two signals are similar to S1.

How is this possible?