A PAPR Reduction Scheme Without Side Information For OFDM Signal Transmissions

Abstract—Orthogonal frequency division multiplexing (OFDM) is a promising broadband transmission technique. However, OFDM has a drawback of large peak-to-average power ratio (PAPR), which is proportional to the number of subcarriers. A PAPR reduction scheme called tone injection (TI) was proposed that exploits the property of a nonlinear modulo function. The TI is equivalent to the one that superimposes a quadrature amplitude modulation (QAM) signal on the data symbol to reduce the PAPR. Without the transmission of the side information, the TI significantly reduces the PAPR level. In this paper, the PAPR advantage and the BER disadvantage of the TI are discussed. First, the TI is reviewed and the theoretical bit error rate (BER) analysis is presented. The effectiveness of the TI is confirmed by measuring the PAPR distribution.