Reduced Computational Complexity PTS Scheme for PAPR Reduction of OFDM Signals

As a promising scheme, partial transmit sequences (PTS) provides an effective solution for peak-to-average power ratio (PAPR) reduction of orthogonal frequency division multiplexing (OFDM) signals. However, the main drawback of original PTS (O-PTS) is the large computational complexity. In this paper, a reduced computational complexity partial transmit sequences (RCC-PTS) is proposed. In RCC-PTS, a low complexity phase weighting process is implemented, where the relationship between phase weighting sequences is considered and the computation for candidate signals is simplified by making use of this inherent feature. Theoretical analysis and simulation results show that, compared with O-PTS, our RCC-PTS can not only reduce computational complexity clearly but also has an advantage of no loss in PAPR reduction performance.