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by CraigJPerry
2561 days ago
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I dont know why you're being downvoted, it's a truly fascinating concept. One method has your input data taken bit by bit and combined with a pseudo random code, which never changes and is pre shared with all participants. Effectively each bit gets transmitted at multiple frequencies concurrently and as the receiving side knows the pseudo random code, it uses statistical inference to decide if it's seeing enough evidence of a 0 or a 1 in the various frequencies as dictated by the code. You pull something out of the noise floor, without applying the statistical methods the received signal is indistinguishable from noise. It's certainly not possible to look at 1 frequency and decode the transmission because the transmission medium is lossy and constantly corrupts the transmission of individual bits randomly |
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