>> the lack of obvious signal in we actually recorded > This is something I’m curious about - I’m led to understand that modern digital signaling is almost imp

>> the lack of obvious signal in we actually recorded > This is something I’m curious about - I’m led to understand that modern digital signaling is almost impossible to tell from noise, unless you know what you’re looking for (encryption and compression both conspire against obvious structure), is that not the case? Would it be obvious from a signal construction level that we were looking at, well, signal, and not noise? Wouldn't that just be a barrier to decoding the message but not detecting that it was a signal? I'm not an electrical engineer, but wouldn't any digital signal rise up from the noise floor with some detectable artificial structure (like regularly timed but varied pulses; e.g. 1001 1011 1110 0001, each pair of 1s is separated by an integer multiple of the pulse time).