Partial Shift Mapping for PAPR Reduction With Low Complexity in OFDM Systems
The high peak-to-average power is one of the main drawbacks in OFDM systems. This paper proposes a Partial Shift Mapping (PSM) method for peak power reduction in OFDM systems. By utilizing the properties of the discrete Fourier transform, the proposed method generates a set of candidate signals without additional complex multiplication and selects the one with minimum peak power for transmission. Analyzes and simulations confirm that the PSM method achieves satisfactory peak power reduction performance and low complexity compared with other kindred methods, for example, selected mapping and partial transmit sequences.