Comment by willis936

I ran into this many years ago when trying to inspect spectral content of data from a fancy oscilloscope that had sub-sample accurate timestamps.

There are some tricks to solve my problem. The general term for it is "periodogram".

https://en.wikipedia.org/wiki/Least-squares_spectral_analysi...

https://www.mathworks.com/help/signal/ug/spectral-analysis-o...