S-PTS for PAPR Reduction in OFDM Systems

Partial transmit sequences (PTS) is a class of distortless PAPR reduction techniques for OFDM systems. However, the high complexity of PTS remains a problem. In the work by Baxley and Zhou (2007), the authors show that the PAPR reduction performance of PTS is not as good as that of another distortless technique-selected mapping (SLM) with the same computational complexity. To alleviate this problem, a novel selected PTS (S-PTS) method with low complexity is proposed. The main idea is based on selecting part of the candidate signals from the overall signals, so as to make a better tradeoff between PAPR reduction and computational complexity. Simulation results demonstrate that the PAPR reduction performance of S-PTS is better than that in SLM when their overall computational complexities are identical.