说明：  PEAK TO AVERAGE POWER RATIO REDUCTION OF OFDM SIGNALS USING PEAK REDUCTION CARRIERS: ABSTRACT A technique is described for a better than 5 dB reduction in the Peak to Average Power Ratio (PAPR) of an OFDM signal. The optimal amplitude and phase of additional peak reduction carriers (PRC) is obtained using a codebook, which is obtained using a search of all possible signal combinations.