Sine wave signal processing and filtering questions

[oyw1022]

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I created a white Gaussian sine pattern that mixes noise with a sine wave. The next procedure I would like to do is smooth the noise in the white Gaussian sine pattern, or use the fading filter to output the original sine wave again, but there are too many filters supported by LabVIEW so I don't know what to use.

Q1. Which filter would you recommend?

• Q2.I want to create a graph showing the signal strength on the X axis and the SNR value on the Y axis. What should I do?

Limitations: I am only using USRP2921 and evaluation version LabVIEW NXG2.1.

[Henrik_Volkers · Accepted solution]

If you know that your signal is a sine  (assumed constant for the duration of watching), the best method is a (LSME)  sine fit.

You can see it as a very narrow band filter 🙂

Don't know if NXG eval include the tone detection vi .. but it's worth a try