Timeline for Cross-correlation of two signals using matlab
Current License: CC BY-SA 3.0
10 events
| when toggle format | what | by | license | comment | |
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| Aug 25, 2017 at 13:26 | vote | accept | dsax7 | ||
| Aug 22, 2017 at 8:26 | comment | added | dsax7 | My question is more, whether the amplitude should be the factor that would indicate which the better correlation is or should I be looking for the peak? | |
| Aug 22, 2017 at 6:16 | comment | added | dsax7 | Thanks for all of your answers! This made a lot of things clear, however, I have one last question. How would I be able to determine, which correlation is stronger, when comparing these two, as they look relatively the same and the strong peak is missing in both? | |
| Aug 20, 2017 at 21:11 | comment | added | Fat32 | An envelope signal is always positive (nonnegative) hence its mean cannot be zero, therefore when computing the correlations this will affect the result. Or you could subctract the mean before processing. I cannot tell much about coherence analysis. Correlation is the most important tool to decide on similarities between two signals. I don't know why you don't want to use it. As I said, I cannot say much about coherence analysis. It's up to you then. | |
| Aug 20, 2017 at 19:12 | comment | added | dsax7 | Why would it have consequences when it is zero mean? If the cross correlation is not a viable way to measure similarities in the two signals, how should I then achieve this? With coherence analysis? | |
| Aug 20, 2017 at 18:19 | comment | added | Fat32 | Note that the envelope will be non-zero mean. It will have consequences... | |
| Aug 20, 2017 at 16:57 | comment | added | Fat32 | yes you can use enlevopes instead of the signal itself for the correlation analysis but then you would be looking for a different kind of similarity other than waveform matching, which is the core concept of correlation. Note that different signals at different frequencies can have the same (or similar) envelopes. | |
| Aug 20, 2017 at 16:12 | comment | added | dsax7 | Great answer! This really cleared up some questions. However, I am still wondering, would it make difference if I use the RMS envelopes of the two signals for the cross correlation? | |
| Aug 20, 2017 at 13:18 | history | edited | Fat32 | CC BY-SA 3.0 |
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| Aug 20, 2017 at 13:11 | history | answered | Fat32 | CC BY-SA 3.0 |