wave phase adjustment between several signals

Hi!

Can anyone help me on this?

I have a file with 8 wave signals that belong to the same wave gauge S1:

time signal1 signal2 signal3 signal4.....

https://www.dropbox.com/sh/kz19ytfihg8vc8i/AAALiGMFQxBS78KT2hZ8Qihma

The ideia is to adjust the phase of the signals so that they start with the same wave phase and height. If I do this manually (as I did in the figure) I have to shift each signal in time until I find a proper overlapping for the 8 signals.

Is there any function/routine available for this purpose?

Many thanks!

[Star Strider]

I can’t open your file in either Excel or MATLAB. Save it in another format (like .csv) and try again. (Use the ‘paperclip’ or ‘staple’ icon above the window.)

[Ana]

Hi,

Thanks for the comment. Here goes the '.csv' file.

[Star Strider]

Thanks. I’ll work with it and see if I can provide a solution. No promises, though.

Answer 1

[Daniel kiracofe]

I think xcorr() may help here. xcorr() will basically try every possible time shift for you, and let you know what shift makes the peaks and valleys line up "the best". I looked at your data, and you'll probably want to slice out the first few cycles and use xcorr on that instead of the whole data set.

Here is a short example from my website on the use of xcorr()

http://www.mechanicalvibration.com/Using_cross_correlation_lin.html