4 ms·
What you are describing there is basically longwave AM radio broadcasting. Large transmitter, small transistor radio receiver. Low speed data can be and is sen
by PoachedSausage 9y ago
What you are describing there is basically longwave AM radio broadcasting. Large transmitter, small transistor radio receiver.
Low speed data can be and is sent using such transmitters, it is done by phase modulating the carrier. The data can be used to switch electrical appliances on and off.
https://en.wikipedia.org/wiki/Radio_teleswitch https://en.wikipedia.org/wiki/Radio_teleswitch
https://en.wikipedia.org/wiki/Droitwich_Transmitting_Station https://en.wikipedia.org/wiki/Droitwich_Transmitting_Station
Droitwich puts out 500kW and reception range is on the order of 1000km.
- owenversteeg 9y agoRight, but that's only one direction. I thought I put it in my comment, but I'm only curious about bidirectional stuff. The best path forward here seems to be WSPR- like stuff, but that requires larger transmitters on the order of tens of meters.
- PoachedSausage 9y agoThat's the problem, an asymmetry in transceiver size does not really lend itself to bidirectional unless its relatively short distances like cellular phone networks.