Suboptimal Hierarchical Iterative PTS Combined with U-Transform PAPR Suppression Approach

Aiming at the problems of high computational complexity of the commonly used partial transmit sequence (PTS) algorithm and signal distortion caused by U-transform in orthogonal frequency division multiplexing (OFDM) systems, a suboptimal hierarchical iterative PTS (SH-IPTS) combined with U-transform peak-to-average power ratio (PAPR) suppression method is proposed, which further optimizes the flow of the SH-IPTS algorithm and combines with the U-transform method to achieve the PAPR suppression of waveforms with less computing burden and low distortion. Simulation results show that this method is better than the SH-IPTS and U-transform algorithms for PAPR suppression, with lower computational complexity and waveform distortion, and achieving the suppression effect of “u=3” at “u=1”.