This link helped me understand it better. Basically they introduce an extremely redundant orthogonal code and since noise is somewhat random if your code is lon

This link helped me understand it better. Basically they introduce an extremely redundant orthogonal code and since noise is somewhat random if your code is long enough you can reconstruct the signal despite the noise. https://electronics.stackexchange.com/questions/321186/is-it-possible-to-receive-information-if-the-received-power-is-below-the-noise-f#321187 https://electronics.stackexchange.com/questions/321186/is-it...