How about long-distance power line communication (EMC) using power line carrier PLC?

EMC design for long-distance power line communication (PLC) PLCs needs to address signal attenuation and environmental noise. Repeater technology is employed, with repeaters deployed every 500 meters to amplify and filter the signal. Forward error correction (FEC) coding, such as Reed-Solomon codes, is used to improve interference immunity. High-voltage coupling transformers (6000VAC) and safety capacitors (0.1μF/1000V) are used at coupling points. Impedance matching is optimized through simulation analysis of long-distance transmission characteristics. In actual testing, a communication rate of 1kbps was achieved over a distance of 10 kilometers, with a bit error rate below 10^-5. This long-distance EMC design enables the system to be applied to remote monitoring, such as power transmission line monitoring.