CDMA works on the principle that the most benign interference appears as random "white" noise. In order to modulate users signals (with unique Walsh codes) pseudo random noise generators are used to create the "PN" sequence. As it turns out, random numbers are of critical use in so many areas of the internet - primarily for security - as well as in radio technology like CDMA. I don't think that PN generators will ever be replace by lava lamps and web cams...but hey - this is a unique solution to "creating" randomness from Wired magazine


Wired 11.08: Totally Random