I have been building several VI's to compute the power spectrum of an incoming signal. I would like to try something more advanced, but I honestly don't know where to start.
What I would like to do is to take a window of the incoming signal -- say 5ms @40000samples/second for 200 samples -- and compute the power spectrum first with 200 samples, then with 199, then with 198, ..., down to 190 samples and to compare these spectra. That is, the same 5ms chunk of signal, but each time doing the FFT with fewer samples.
I believe what I need to do is to create a custom window to use with the Adv. Signals FFT Periodogram, but I'm not certain of this. Any advice would be greatly appreciated as Google is proving unhelpful.