What I don't understand is the connection between the sample rate, the baud rate, decimation and using convolution or correlation.
I'm sampling at 2048000 Hz but I don't know my baud rate, I estimated it (by looking at the time length of one of the short pulses) to be about 2000 pulses per second.
So these are my steps (roughly):
- get samples
- decimate by about 1000
- correlate with ones
Here is an example of what my signal looks like after demodulation:
You can see that there are 4 symbols but many many samples. How can I turn those many many sample into just 4 symbols? I think it is related to convolution/correlation, but I'm not sure how.