Patent ID: 8363800

Claim:
A power-line communication apparatus for transmitting a multi-carrier signal including a plurality of sub-carriers to another communication apparatus through a power line, comprising: a phase rotation section configured to rotate phase of at least one sub-carrier among the plurality of sub-carriers, by use of a first phase vector or a second phase vector that differs from the first phase vector; a multi-carrier signal output section configured to output at least one of a first multi-carrier signal in which phase of at least one sub-carrier is rotated with the first phase vector, and a second multi-carrier signal in which phase of at least one sub-carrier is rotated with the second phase vector; a band setting section configured to set up at least one of a time band and a frequency band, on the basis of at least one of the first multi-carrier signal and the second multi-carrier signal, which are outputted to a power line by the multi-carrier signal output section; and a communication section configured to perform communication with another communication apparatus through a power line, by use of at least one of the time band and the frequency band, which are set up by the band setting section.