Find averages of Simulink model

Question

Nathan Jaqua 2019-11-4

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https://ww2.mathworks.cn/matlabcentral/answers/489212-find-averages-of-simulink-model

回答： Nishant Gupta 2019-11-25

lab_10.slx

I ama trying to find the Average noise level (dB) and Average noise level (dB) in my SImulink model but I don;t see any setting's for averageing my spectrum. WHat Am I doing wrong?

Average tone level(dB): ______________ Average tone level(dB): ______________

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Answer 1

Nishant Gupta 2019-11-25

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https://ww2.mathworks.cn/matlabcentral/answers/489212-find-averages-of-simulink-model#answer_403186

You can try the following options:

Option 1: You can use the MER Measurement Block (refer following link for documentation) to measure the signal-to-noise ratio (SNR).

https://www.mathworks.com/help/comm/ref/mermeasurement.html?searchHighlight=mer&s_tid=doc_srchtitle

Option 2: You can use MATLAB Function Block and call 'snr' function from MATLAB, 'snr' function (refer following link for documentation) returns the signal-to-noise ratio as well as total noise power.

https://www.mathworks.com/help/signal/ref/snr.html#bt2g8x3-3

Then, SNR(dB) = Signal Power(dB) - NoisePower(dB)