PEAK POWER SUPPRESSING APPARATUS AND PEAK POWER SUPPRESSING METHOD

摘要

A peak power suppression apparatus and a peak power suppression method that reduce memory capacity and the amount of calculation while suppressing peak power in an OFDM signal. A frequency shift section (103) applies frequency shift to an OFDM signal generated in an IFFT section (102) in such a way that the frequency of a peak suppression carrier in this OFDM signal becomes 0. A direct current setup section (105) calculates a direct current signal that suppresses peak power in the frequency-shifted OFDM signal. An addition section (106) adds the direct current signal from the direct current setup section (105) to the frequency-shifted OFDM signal. A frequency shift section (111) applies to the OFDM signal to which the direct current signal has been added frequency shift in such a way that the frequency of the peak suppression carrier in this OFDM signal returns. <IMAGE>