Residue Number System Based OFDM Method for Lossless PAPR Reduction

The main limitation of Orthogonal Frequency Division Multiplexing (OFDM)-based transmission systems is the high Peak-to-Average Power Ratio (PAPR) of the transmitted signals. This paper proposes a residue number system (RNS) based OFDM transmission method. This method can achieve lossless PAPR reduction by using the features of RNS to control dynamic range of the transmitted signals and to avoid nonlinear distortion. Numerical results show that the proposed method offers PAPR performance improvement at least 5 dB and takes less transmission bandwidth when the SNR of OFDM is above 0 dB, compared with the original OFDM.