3 ms·
With 100 Milliwatt around the continent, wow, that’s crazy. Would be interesting to see, what wallstreet would do with it. Light speed in Fibre is Slow than RF,
by BonoboIO 4y ago
With 100 Milliwatt around the continent, wow, that’s crazy.
Would be interesting to see, what wallstreet would do with it.
Light speed in Fibre is Slow than RF, they are buying towers for direct connections via RF.
For low bandwidth, but time critical signals this could be a thing.
But what do I know :D
- retrac 4y agoUnfortunately SNR and time are interrelated. A very weak signal can be strengthened, by comparing it over time. The longer it is present, the less likely what is being received is noise. But that process blurs things over time, unsure precisely when a change in the signal occurred. Depending on the power and speed, it could take many milliseconds, or even seconds, to say whether the signal has changed. HF also has variable propagation. It doesn't always take the same path. So timing can be all over the place. Much lower frequencies (around 100 kHz instead of 10000 kHz) hug the ground, and their timing can be very precise. Low frequency was once used by navigation systems with ground-based transmitters. Takes huge antennas and transmitters to broadcast a strong enough signal for that. They were some of the biggest ever constructed. High-power HF (in the kilowatt range) has been suggested before for high speed trading: https://spectrum.ieee.org/wall-street-tries-shortwave-radio-to-make-highfrequency-trades-across-the-atlantic https://spectrum.ieee.org/wall-street-tries-shortwave-radio-...