HOW CAN I CALCULATE THE SIGNAL TO NOISE RATIO(SNR) OF A CHIRP SIGNAL
I have a signal which is comprised of 4 chirp signals and an additive noise with the same sampling frequency and size is generated now i need to calculate the SNR of the signal and noise . Also if I am correct to vary the signal to noise ratio is it ok if I vary the amplitudes of chirp signals and also the noise by multiplying it with a factor : ex: noise = randn(size(t)); where t = 0:1e-4:1; and to increase the noise {new noise = 2*noise ;} is this correct?? and to increase the amplitudes of the signal is this the way to change the signal to noise ratio: y3 = 5* chirp(t,600,t1,800,'linear'); ???????y4 = 3.5*chirp(t,900,t1,980,'linear');
Prashant Kumar answered .
2025-11-20
NR = Psignal / Pnoise = (Asignal / Anoise)^2
RMS = @(x) sqrt(mean(x.^2));
Now you can compute your ratio like so:
RMS = @(x) sqrt(mean(x.^2));