Remove noise from data (out of phase)

Question

Ellen 2020-9-14

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/593362-remove-noise-from-data-out-of-phase

回答： Image Analyst 2020-9-14

Hi

I am wondering if someone can help me with the following. I have some data over time aka data+noise signal and the noise signal itself. Now I'd like to remove the noise signal so I am left with the data without the noise signal. I did this by simply subtracting it: data+noise - noise. However, the problem is that the noise signal is out of phase so now I am only creating more noise by subtracting. Does someone know how to solve this? Perhaps finding out what the exact phase delay is? The data is attached.

Thank you!