Patent ID: 8879700

Claim:
A communication apparatus for transmitting a multi-carrier signal including a plurality of sub-carriers to another communication apparatus through a transmission channel, comprising: an integrated circuit; a housing which accommodates the integrated circuit therein; a first connector which is adapted for connecting a power line provided on a first side of the housing; and an indicator which is provided on a second side of the housing; wherein the integrated circuit includes: 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; a multi-carrier signal output section configured to output first multi-carrier signal in which phase of at least one sub-carrier is rotated with the first phase vector; a multi-carrier signal detection section capable of detecting a second multi-carrier signal, from another communication apparatus, in which phase of at least one sub-carrier is rotated with a second phase vector that differs from the first 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; and a communication section configured to perform communication with another communication apparatus through the transmission channel, by use of at least one of the time band and the frequency band, which are set up by the band setting section.