I am analysing a captured 433.92MHz signal sampled at 2MHz: enter image description here

If we zoom in:

enter image description here

I am thinking this is PSK? Am I wrong?


  • $\begingroup$ "this is what I get": Is this the real-valued signal, or is this amplitude or I or Q of an equivalent baseband? Are you sure you're sampling sufficiently? The jumps in some of the oscillations indicate there might be something else going on. Generally, the fact that this is non-continuous and doesn't seem to be on a common timebase might mean you're looking at whole packets of signal, and your filtering might have removed all the data. Again, with the amount of information we have, pure speculation. My guess is that this might be some PPM, or coded OOK, or something more esoteric alltogether. $\endgroup$ – Marcus Müller Mar 15 at 16:48
  • $\begingroup$ @MarcusMüller you are right, is this better? $\endgroup$ – nachofest Mar 15 at 16:52
  • $\begingroup$ OK, since I assume "434 MHz signal sampled at 2 MHz" means complex baseband, no: you haven't answered whether we're looking at I, Q, or magnitude in these plots. $\endgroup$ – Marcus Müller Mar 15 at 17:15

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.