Hi Anas,
I understand you want to convert a signal from time domain to frequency domain. You can use MATLAB’s ‘fft’ function.
You can go through this official MATLAB documentation to transform a signal between time and frequency domain.
To plot the frequency domain in decibels, you can use this formula to convert the signal into decibels.
Y = fft(X, N);
Y = abs(Y(1:N/2+1));
fftResult_dB = 20 * log10(Y);
Here is a MATALAB answer on how to transform the data to decibels and plot it.
To calculate the signal to noise ratio of the signal you can use MATLAB’s “snr” function. After creating a function, you can add it to Simulink using “MATLAB function block” as both “fft” and “snr” functions are supported by the block.
Please refer to the official MATLAB documentation of the “snr” function and “MATLAB function” block to learn more about them.
- https://www.mathworks.com/help/releases/R2024a/signal/ref/snr.html
- https://www.mathworks.com/help/releases/R2024a/simulink/ug/what-is-a-matlab-function-block.html
Hope this helps!!
Thanks
