Re:Model predicts we're the only advanced civilization in th...
by sliken on Monday June 25, 2018 @10:35PM
(#17397488)
You are describing FM, which does dump quite a bit of power into the carrier wave.... which is exactly why it's not used if you care about range/efficiency.
Check out things like "Olivia_MFSK" on wikipedia for something more current. It can transmit even with 14dB below the noise floor.
Seems like a any sane communication method for any galaxy spanning civilization would be:
* encoded in such an advanced way that we wouldn't see it, even if using signals within our physics.
* be highly directional
Maybe something like 1% of the asteroid belt would be converted into communication sats that could form a swarm that would over a few ns significant outshine the sun by focusing a signal on whoever you want to communicate with.
Of course typically the cloud of sats would be handling within the solar system communications or nearby stars that didn't require the entire cloud.
I do wonder if you could capture say 0.01% of the solar radiation for 24 hours and with 50% conversion frequency generate a single for 1 ns on the ideal frequency... could you outshine the galaxy on that frequency?
Of course the ideal frequency would be minimally blocked by dust and minimally generated by stars. The "Water hole" as mentioned by Seti (among others) would be a good start.
Check out things like "Olivia_MFSK" on wikipedia for something more current. It can transmit even with 14dB below the noise floor.
Seems like a any sane communication method for any galaxy spanning civilization would be: * encoded in such an advanced way that we wouldn't see it, even if using signals within our physics. * be highly directional
Maybe something like 1% of the asteroid belt would be converted into communication sats that could form a swarm that would over a few ns significant outshine the sun by focusing a signal on whoever you want to communicate with.
Of course typically the cloud of sats would be handling within the solar system communications or nearby stars that didn't require the entire cloud.
I do wonder if you could capture say 0.01% of the solar radiation for 24 hours and with 50% conversion frequency generate a single for 1 ns on the ideal frequency... could you outshine the galaxy on that frequency?
Of course the ideal frequency would be minimally blocked by dust and minimally generated by stars. The "Water hole" as mentioned by Seti (among others) would be a good start.