Abstract: Power line communication apparatuses 100a, 100x each is equipped with a power line communication unit connected to a power line, for performing a power line communication; RFID tag 50a, 50x for storing thereinto communication setting information employed when a communication is carried out in the power line communication unit; and RFID tag reader 40a, 40x having an antenna, for reading out the information stored in the RFID tag 50a, 50x by employing a wireless communication. The power line communication apparatus 100a reads out the communication setting information of the power line communication apparatus 100x from the RFID tag 50x, and performs the power line communication with the power line communication apparatus 100x based upon the communication setting information.

Abstract: The invention provides a power-line carrier communication apparatus including a transmission unit with a signal point mapping device for mapping a plurality of bit streams produced from transmission data, a wavelet inverse transforming device for modulating the respective sub-carriers by wavelet waveforms which are orthogonal to each other for producing temporal waveform series data, and a D/A converter for converting the temporal waveform series data into an analog temporal waveform series signal; and a reception unit with an A/D converter for obtaining sampling-series waveform data from a power-line communication signal, a wavelet transforming device for wavelet-transforming the sampling-series waveform data into signal point data of the respective sub-carriers, and a symbol judging device for judging bit streams mapped by the signal point mapping device by inverse-mapping a plurality of these signal point data, and for synthesizing the judged bit streams with each other as a reception data series.

Abstract: In a transmitter, either the voltage or the current, or both applied to each of a pair of conductors is monitored. In a receiver either the voltage or the current, or both outputted from each conductor are monitored, thereafter the status will be outputted. Using the outputted status, either the voltage or the current, or both applied to the conductors in a transmitter will be controlled. This makes it possible to improve the degree of balance in the receiver while keeping the balance in the transmitter, which results in reducing EMC problems both in the transmitter and the receiver.

Abstract: The invention provides a power-line carrier communication apparatus including a transmission unit with a signal point mapping device for mapping a plurality of bit streams produced from transmission data, a wavelet inverse transforming device for modulating the respective sub-carriers by wavelet waveforms which are orthogonal to each other for producing temporal waveform series data, and a D/A converter for converting the temporal waveform series data into an analog temporal waveform series signal; and a reception unit with an A/D converter for obtaining sampling-series waveform data from a power-line communication signal, a wavelet transforming device for wavelet-transforming the sampling-series waveform data into signal point data of the respective sub-carriers, and a symbol judging device for judging bit streams mapped by the signal point mapping device by inverse-mapping a plurality of these signal point data, and for synthesizing the judged bit streams with each other as a reception data series.