MULTICARRIER SIGNAL TRANSMISSION DEVICE, MULTICARRIER SIGNAL RECEPTION DEVICE, MULTICARRIER SIGNAL TRANSMISSION METHOD, AND MULTICARRIER SIGNAL RECEPTION METHOD

摘要

A multicarrier signal transmission device includes: a multicarrier modulation circuit, a power converter, a frequency converter, and a cross talk protection judgment circuit. The cross talk judgment circuit judges a power level difference between the multicarrier signal high hierarchy portion and the multicarrier signal low hierarchy power so as to prevent generation of digital cross talk. According to the judgment information, the power converter converts the power level of the multicarrier signal as is required. According to the judgment information, the frequency converter converts the center frequency band of the multicarrier as is required. Thus, it is possible to prevent a digital cross talk of the hierarchized multicarrier signal.