PTS with Alternate Odd-Even Subblock Weighting for PAPR Reduction in OFDM Systems

摘要

Partial transmit sequence (PTS) is one of multiple signal representation schemes for peak-to-average power ratio (PAPR) reduction in orthogonal frequency division multiplexing (OFDM) systems, which provides good PAPR reduction performance without any signal distortion. However, for conventional PTS (CPTS), large numbers of candidate sequences are required to obtain the satisfactory PAPR reduction performance, which induces large computational complexity. In this paper, a novel PTS with alternate odd-even subblock weighting is proposed. In the proposed scheme, the whole phase weighting process is divided into two stages, i.e., the odd subblock weighting and the even subblock weighting. Moreover, in each stage of phase weighting process, the characteristic of phase weighting sequences is utilized for simplifying the computation of candidate sequences. Simulation results show that compared with CPTS, the proposed PTS scheme can reduce computational complexity clearly with similar PAPR reduction performance.