http://forums.ni.com/t5/Dynamic-Signal-Acquisition/SNR-measurement-VI/td-p/224168

[emnajaoua]

Actually I am working on 2 USRP 2901 (one act as transmitter and the other as a receiver ).I do the modulation /demodulation for both of them (QPSK).

I want to measure the snr from the receiver.Is there any VI which do that ??

Thanks in advance.

[FinchTrain]

Hi,

I've found a forum discussing the calculation of the SNR in LabVIEW. Though this is not the communication suite, you can likely taylor these customer examples to your systems needs. There are numerous examples listed here as well as different approaches customers have taken. Do you have access to LabVIEW (not the communications suite)?

SNR measurement VI?

http://forums.ni.com/t5/Dynamic-Signal-Acquisition/SNR-measurement-VI/td-p/224168

If you have any follow up questions I'd be glad to help.

Regards,

Finch Train

[emnajaoua]

Hello,

Thank you for your reply.I have taken a look on the discussion that you gave me but besides that it is using labview not labview communications design there are some VIs that uses DAQmax I guess.

Well I think that I can calculate the power of the incoming signal but do you know how can I calculate the power of noise so I can make the formula of the noise.

Thank you in advance.

Best Regards,

Emna.

[emnajaoua]

Is there some GVI similar to this one in labview communication design suite ??

https://zone.ni.com/reference/en-XX/help/371361H-01/lvwave/sinad_analyzer/

[FinchTrain]

Hi,

I am looking into this possibility, though it is important to clarify I am using version 1.1. Are you using version 1.1 or 2.0? I'll update you with anything I am able to find in 1.1.

Regards,

Finch Train

[FinchTrain]

Hi,

There is no direct replacement for the SINAD VI or a similar VI in 1.1. You may have to pull the raw values you need and then design the code to calculate the SNR as a work around. If you are interested, there are multiple forums discussing work arounds that customers used in LabVIEW. While it is not the communications suite, the process of getting the raw values and using them to get your desired output follows the same general framework. Let me know how I can help going forward.

Regards,

Finch Train

[FinchTrain]

Hi,

I'd also like to clarify in reviewing this psot that I meant 1.0 or 1.1, not 2.0. Keep me posted if you have any questions.

Regards,

Finch Train

[emnajaoua]

HI Finch Train ,

I am sorry for making you waiting.I have been busy those days.Actually like you said befor I didn't found anything similar to the GVI that you gave me but I am interested in generating raw values like you said.Is there any scheme for the SNR analyze in labview that I can do something similar to in labview communications design ?

I am using labview communications design 1.1

Best Regards,

Emna

[FinchTrain]

Hi,

I'd like to apologize for my delayed response, as I was not available over the holiday. I am currently trying to look at the Power Spectrum Measurement example and take a simple waveform to see how to recreate this functionality.

Regards,

Finch Train