TRANSMISSION DEVICE, TRANSMISSION AIDING DEVICE, RECEPTION DEVICE, RECEPTION AIDING DEVICE, TRANSMISSION/RECEPTION SYSTEM, AND COMMUNICATION METHOD

摘要

Provided are a transmission device, a transmission aiding device, a reception device, a reception aiding device, a transmission/reception system, and a transmission method, which can be applied entirely to a multi-carrier modulation system including the OFDM, xDSL, and MC-CDMA systems and which can reduce an electric power at a transmission time. Input data is converted by an S/P conversion unit (120) into parallel symbols, the sequence of which is then rearranged by a mapper unit (130). These rearranged symbols are then converted into multi-carrier modulation signals in an IFFT unit (140), and an electric power is measured by a peak power measurement unit (150). These series operations are continued within a predetermined number of times till the power becomes a threshold value or less. When it is decided by the peak power measurement unit (150) that the power becomes the threshold value or less, the multi-carrier modulation signal is transmitted from the transmission device by a radio transmission unit (160).