Abstract
Orthogonal frequency division multiplexing (OFDM) has been adopted as standard beginning with the 4th generation mobile communication system because of its high-bit-rate transmission capability under frequency selective fading channel conditions. However, a major disadvantage of OFDM is the non-constant envelope signal with a high peak-to-average power ratio (PAPR). The high peak signal in OFDM is distorted through a nonlinear amplifier, which causes bit error ratio (BER) reduction. Many techniques have been developed for reducing PAPR at the cost of inefficient bandwidth usage or throughput because of the additional information about PAPR reduction. We propose a novel method, in which the high peak signal above the threshold of the nonlinear amplification region is nonlinearly downscaled to lower the PAPR. The time slot location and scaling ratio for where and how the high peak baseband OFDM signal is downscaled are transmitted using frequency modulation (FM) combined with OFDM, which requires less additional bandwidth than the previously proposed methods. Simulation results show that the proposed novel method provides a lower PAPR and elicits a better BER performance compared with other conventional methods, because it reduces the PAPR by nonlinear scaling and restores the pre-distorted signal using FM.
Similar content being viewed by others
References
Anoh K, Adebisi B, Rabie KM, et al., 2018. Root-based nonlinear companding technique for reducing PAPR of precoded OFDM signals. IEEE Access, 6:4618–4629. https://doi.org/10.1109/ACCESS.2017.2779448
Joo HS, Kim KH, No JS, et al., 2017. New PTS schemes for PAPR reduction of OFDM signals without side information. IEEE Trans Broadcast, 63(3):562–570. https://doi.org/10.1109/TBC.2017.2711141
Kumar Singh V, Dalal UD, 2017. Abatement of PAPR for ACO-OFDM deployed in VLC systems by frequency modulation of the baseband signal forming a constant envelope. Opt Commun, 393:258–266. https://doi.org/10.1016/j.optcom.2017.02.065
Kumar Singh V, Dalal UD, 2018. Integration of frequency modulated constant envelope technique with ADO-OFDM to impede PAPR in VLC. Opt Commun, 418:80–87. https://doi.org/10.1016/j.optcom.2018.02.055
Lee BM, Rim YS, Noh W, 2017. A combination of selected mapping and clipping to increase energy efficiency of OFDM systems. PLOS ONE, 12(10), Article e0185965. https://doi.org/10.1371/journal.pone.0185965
Ni CX, Ma YH, Jiang T, 2016. A novel adaptive tone reservation scheme for PAPR reduction in large-scale multiuser MIMO-OFDM systems. IEEE Wirel Commun Lett, 5(5):480–483. https://doi.org/10.1109/LWC.2016.2588489
Ochiai H, Imai H, 2001. On the distribution of the peak-to-average power ratio in OFDM signals. IEEE Trans Commun, 49(2):282–289. https://doi.org/10.1109/26.905885
Pamungkasari PD, Sanada Y, 2015. Time domain cyclic-selective mapping for PAPR reduction using delayed correlation with matched filter in OFDM system. 22nd Int Conf on Telecommunications, p.373–377. https://doi.org/10.1109/ICT.2015.7124714
Pandey P, Tripathi R, 2013. Comparative analysis of peak-to-average power ratio (PAPR) reduction techniques for OFDM system. Proc 4th Int Conf on Computer and Communication Technology, p.163–168. https://doi.org/10.1109/ICCCT.2013.6749621
Sravanti T, Vasantha N, 2017. Performance analysis of precoded PTS and SLM scheme for PAPR reduction in OFDM system. Proc Int Conf on Innovations in Electrical, Electronics, Instrumentation and Media Technology, p.255–260. https://doi.org/10.1109/ICIEEIMT.2017.8116845
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Yi-hu XU, Jung-Yeol OH, Zhen-hao SUN, and Myoung-Seob LIM declare that they have no conflict of interest.
Additional information
Project supported by the Research Funds of Chonbuk National University in 2019 and the Natural Science Foundation of Jilin Province, China (No. 20170520165JH)
Rights and permissions
About this article
Cite this article
Xu, Yh., Oh, JY., Sun, Zh. et al. A novel method for PAPR reduction of the OFDM signal using nonlinear scaling and FM. Front Inform Technol Electron Eng 20, 1587–1594 (2019). https://doi.org/10.1631/FITEE.1800438
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1631/FITEE.1800438
Key words
- Orthogonal frequency division multiplexing
- Peak-to-average power ratio
- Nonlinear scaling
- Frequency modulation