Timeline for How to measure/estimate symbol rate of a signal with unknown ( but probably QAM ) modulation?
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
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| Feb 14, 2016 at 17:02 | comment | added | Marcus Müller | Have a look at "fast correlation", as implemented using multiplication in Fourier domain supported by FFTs. By zero-padding, you can increase accuracy; which happens to actually be equivalent to interpolation in time domain. | |
| Feb 13, 2016 at 14:19 | vote | accept | jhegedus | ||
| Feb 13, 2016 at 14:15 | comment | added | jhegedus | One questions comes to mind, when I do auto-correlation, then should I do some kind of upsampling before doing that ? Currently I sample with 40MPS and it seems that the signal bandwidth is about 9.8 MHz , so the symbol rate should be slightly below 10 Mbaud, so about 3.9 samples per symbol. Hence I wonder if I would need to do some kind of upsampling to be able to see a peak corresponding to 3.9 samples per symbols in the autocorrelation function. I think yes. What do you think ? | |
| Feb 13, 2016 at 14:10 | comment | added | jhegedus | Many thanks for pointing out the auto-correlation, that sounds indeed useful and it did not come to my mind :) - how embarrassing :) | |
| Feb 13, 2016 at 10:43 | history | answered | Marcus Müller | CC BY-SA 3.0 |