Multicarrier communication apparatus, integrated circuit, and multicarrier communication method

摘要

A digital transmission signal from a digital signal processing unit is converted to an analog signal in an analog circuit, and is transmitted from transmission lines via a communication transformer. The digital signal processing unit includes a time carrier detector that detects a carrier by using a time waveform of a reception signal and a frequency carrier detector that detects a carrier by using frequency characteristics of the reception signal. Under the control of a controller, carrier detection is performed by switching between the time carrier detector and the frequency carrier detector for operation.