3 ms·
Very interesting, I'll have to look into AWGN and the Fourier transform. I guess in the trees blocking the flashlight example that's not at all AWGN. Although
by crackalamoo 2y ago
Very interesting, I'll have to look into AWGN and the Fourier transform. I guess in the trees blocking the flashlight example that's not at all AWGN.
Although while we care about the relative amplitudes in AM, AWGN would make this harder to pick out if the signal is attenuated. Is the same idea true for frequencies? I don't see a direct parallel here.
- kragen 2y agoYou do get some frequency deviation from AWGN. The sum of equal-amplitude 100Hz and 120Hz sine waves is a 110Hz sine wave that "beats", which is to say, is amplitude-modulated, at 10 Hz (or 20Hz from a certain point of view). So, if you have a 120Hz signal and you add a 100Hz signal to it, you should expect that to deviate the frequency of the detected signal downwards. AWGN will have varying, random amounts of all frequencies in it, which will cause varying, random amounts of frequency deviation as they add to your signal. It's definitely easier to understand in the Fourier domain.