Patent ID: 7978772

Claim:
A multicarrier communication apparatus that receives a reception signal via a transmission line and detects a carrier of the reception signal, the multicarrier communication apparatus comprising: a first carrier detector that detects the carrier based on time characteristics of the reception signal; a second carrier detector that detects the carrier based on frequency characteristics of the reception signal; and a controller that selects, based on status of the transmission line, one of the first carrier detector and the second carrier detector and switches the selected carrier detector between the first carrier detector and the second carrier detector, wherein the controller selects the first carrier detector at beginning of communication, wherein the controller selects the first carrier detector if the status of the transmission line has a higher quality than a predetermined value and selects the second carrier detector if the status of the transmission line has a lower quality than the predetermined value, and wherein the controller switches from the first carrier detector to the second carrier detector in a case where carrier detection by using the first carrier detector has failed.