Abstract
The interleaved partitioning partial transmit sequence (IP-PTS) scheme is an attractive technique for peak-to-average power ratio (PAPR) reduction in orthogonal frequency division multiplexing (OFDM) systems. But the PAPR performance of IP-PTS is inferior to that of the adjacent partitioning PTS (AP-PTS) scheme because the candidates generated in IP-PTS are not fully independent. This paper analyzes the independence of candidates in IP-PTS in detail and finds the effective phase factor vectors. In order to improve the PAPR performance of IP-PTS, a conjugate IP-PTS (C-IP-PTS) scheme is proposed. By performing the conjugate operations on some sub-blocks, the number of candidates is increased. Because of the conjugate property of the discrete Fourier transform (DFT), the additional inverse DFT can be avoided. By optimizing the conjugate sequence, the complexity can be further lowered. Simulation results show that C-IP-PTS can obtain better PAPR performance compared with AP-PTS; moreover, the computational complexity of C-IP-PTS is not high.
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Wu, X., Wang, J., Mao, Z. et al. Conjugate Interleaved Partitioning PTS Scheme for PAPR Reduction of OFDM Signals. Circuits Syst Signal Process 29, 499–514 (2010). https://doi.org/10.1007/s00034-010-9157-9
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DOI: https://doi.org/10.1007/s00034-010-9157-9