10-25-2011 09:25 AM
Hi. I have used simple blocks like PSK modulator,white noise,phase noise,tone interference, up and down converter and demodulator in a chain to simulate a noisy channel and also perform modulation in LabVIEW. I would like to know is it possible to calculate SNR from the power spectrum live for this channel? Is there any function avaiable in Modulation toolkit to calculate SNR from Power spectrum?
Thanks
Solved! Go to Solution.
10-26-2011 04:56 AM - edited 10-26-2011 04:57 AM
Hello en99,
The Spectral Measurements Toolkit provides VIs to calculate the 'Power in Band'. By taking the ration of this VI and the apparent noise level, I believe you should be able to calculate the SNR.
The screenshot shows where this VI can be found:
12-19-2021 04:25 AM
I try use it. It calculated parameter SFDR, not SNR.
12-19-2021 08:21 AM - edited 12-19-2021 08:25 AM
@Valentin87 wrote:
I try use it. It calculated parameter SFDR, not SNR.
You must have bad math if you have the dynamic range instead of SNR.
How about posting a snippet of your code? That would help us find your mistake a lot quicker.
Are you using RFmx? Why not? SNR is a basic measurement and easy to find. Did you check the shipping examples? SMTK and RFmx examples are pretty good.
Any one of those actions would solve your problem more ("Urgent"ly.)
Although I suspect, it's not that time critical for the rest of us.