I want to add a White Gaussian noise to noise-free signal given desired SNR value. To do that, I am looking for a way to estimate the power of the signal. The noise-free signal looks like the following:
Do you have any clue about how to estimate the power of the signal ( mean of the signal, the integral of the difference between the decreasing linear line and the concave down decreasing line, ....)?
Many thanks in advance!!!