| 摘要 |
PROBLEM TO BE SOLVED: To obtain a power line carrier communication system which does not have to switch a signal frequency, is communicable even if noise and attenuation quantity fluctuate, does not need tuning for signal frequency and is communicative even though the difference in a power line characteristic, noise fluctuations and the fluctuations in the attenuation quantity at an installation place occur in an n-to-n communication. SOLUTION: A power line carrier signal transmitted from a power line carrier device 22 to a power line 21 forms data for one bit by discretely combining plural different frequency waveforms, identifies a waveform for one bit at the time of receiving a power line carrier signal via the line 21 and demodulates data for one bit, based on the waveform of a frequency that has little attenuation via the line 21. |
