Adaptive PAPR reduction using tone reservation and clipping in OFDM transmission over fading channels

Circuits and Systems for Receiving, Transmitting and Signal Processing
Authors:
Chilingarov A.O. Gelgor A.L.Avetisyan V.H.
Abstract:

The high peak-to-average power ratio (PAPR) inherent in orthogonal frequency-division multiplexing (OFDM) signals forces the high-power amplifier (HPA) to operate with substantial input back-off (IBO) value, severely degrading transmitter power efficiency. This paper investigates the joint application of adaptive tone reservation (TR) and clipping for PAPR reduction in OFDM transmission over frequency-selective fading channels. The adaptive TR scheme employs channel state information to dynamically allocate reserved tones to subcarriers that experience poor signal-to-noise ratio (SNR) and are therefore of limited utility for data transmission. Four configurations have been systematically compared: a baseline without PAPR reduction, clipping only, adaptive TR only, and the proposed joint adaptive TR and clipping scheme. Simulations for the case of a measurement-based underwater acoustic channel with a hard-limiter HPA model demonstrate that adaptive TR alone achieves a 2.8 dB SNR gain over the baseline at a target bit error rate of 10−3, without introducing in-band distortion. The joint scheme yields a total SNR gain of 4.6 dB, combining the benefits from distortionless peak suppression by TR with the aggressive clipping action. Relative to clipping-only operation, the joint scheme decreases out-of-band emission by 3.5 dB and compresses the 99.5% occupied bandwidth by 40%. These results confirm that the combination of SINR-based adaptive TR and clipping provides simultaneous improvements in power efficiency and spectral containment, making it a compelling solution for communication systems subject to both power and spectral mask constraints.

Key words:
PAPRtone reservationpower allocationadaptive systemsout-of-band emission suppression
  • References

    1. Rahmatallah Y., Mohan S. Peak-To-Average Power Ratio Reduction in OFDM Systems: A Survey and Taxonomy. IEEE Communications Surveys & Tutorials, 2013, Vol. 15, No. 4, Pp. 1567–1592. DOI: 10.1109/SURV.2013.021313.00164

    2. Thompson S.C., Proakis J.G., Zeidler J.R. The effectiveness of signal clipping for PAPR and total degradation reduction in OFDM systems. GLOBECOM ‘05. IEEE Global Telecommunications Conference, 2005, Pp. 2807–2811. DOI: 10.1109/GLOCOM.2005.1578271

    3. Tuti A.N., Astawa I.G.P., Nadziroh F., Budikarso A., Aswoyo B., Gulo M.M. Combining Clipping and Channel Coding for Effective PAPR Reduction in OFDM System with GNU Radio-USRP. 2024 Inter-national Electronics Symposium (IES), 2024, Pp. 228–233. DOI: 10.1109/IES63037.2024.10665788

    4. Wattanasuwakull T., Benjapolakul W. PAPR reduction for OFDM transmission by using a method of tone reservation and tone injection. 2005 5th International Conference on Information Communications & Signal Processing, 2005, Pp. 273–277. DOI: 10.1109/ICICS.2005.1689049

    5. Nguyen T.K., Nguyen H.H., Bedeer E., Salt J.E., Howlett C. Novel PAPR Reduction Method for OFDM Signals with Tone Reservation and Index Modulation. IEEE Transactions on Wireless Communica-tions, 2026, Vol. 25, Pp. 4261-4275. DOI: 10.1109/TWC.2025.3609634

    6. Abdelali H., Ghennioui H., El-Kamili M., Firdaoussi M. New PAPR reduction technique combining the Tone Reservation based on PCG algorithm with Clipping. 2019 International Conference on Wireless Networks and Mobile Communications (WINCOM), 2019, Pp. 1–6. DOI: 10.1109/wincom47513.2019.89-42490

    7. Limian Gao, Gaojun Song, Xiaofeng He, Renze Luo. Joint optimization of subcarriers allocation and Tone Reservation PAPR reduction for OFDMA systems. 2012 IEEE 14th International Conference on Com-munication Technology, 2012, Pp. 1172–1176.

    8. Liyan Zhang, Xinke Tang, Sihui Zheng, Weijie Dai, Xiao-Ping Zhang, Yuhan Dong. Joint Power Al-location and Probabilistic Shaping for OFDM-UWOC Systems. 2024 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR), 2024, Pp. 1–2. DOI: 10.1109/CLEO-PR60912.2024.10676447

    9. Chafii M., Diallo M.L., Palicot J., Bader F., Gribonval R. Adaptive Tone Reservation for Better BER Performance in a Frequency Selective Fading Channel. 2016 IEEE 83rd Vehicular Technology Conference (VTC Spring), 2016, Pp. 1–3. DOI: 10.1109/VTCSpring.2016.7504119

    10. Pergushev A.O., Sorotsky V.A. Expanding the bandwidth of power amplifiers for high peak-to-average power ratio signals. Radioengineering, 2025, Vol. 89, No. 3, Pp. 24–31. DOI: 10.18127/j00338486-202503-03

    11. Mounzer R., Crussiere M., Nasser Y., Helard J.-F. Tone Reservation Based PAPR Reduction Technique with Individual Carrier Power Allocation for Multiple Peaks Reduction. 2015 IEEE 81st Vehicular Technology Conference (VTC Spring), 2015, Pp. 1–6. DOI: 10.1109/VTCSpring.2015.7146137

    12. Tahkoubit K., Shaiek H., Alexandre C., Faci S., Roviras D. Power budget analysis including PAPR reduction techniques and power amplifier consumption for DVB-T2 and ATSC 3.0. 2023 IEEE Interna-tional Symposium on Broadband Multimedia Systems and Broadcasting (BMSB), 2023, Pp. 1–6. DOI: 10.1109/BMSB58369.2023.10211136

    13. Chilingarov A.O., Gelgor A.L. Adaptive modulation in low-speed non-stationary channels with frequency-selective fading. Journal Radioengineering, 2026, Vol. 90, No. 3, Pp. 126–138. DOI: 10.18127/j00338486-202603-11

    14. Kim K.-H. Clipping Ratio Estimation in OFDM Systems Using Reliable Data Tones. IEEE Wire-less Communications Letters, 2026, Vol. 15, Pp. 2214–2218. DOI: 10.1109/LWC.2026.3672014

    15. Ohta M., Hayakawa T. Deep Learning-Based PAPR Suppression of OFDM Signals with Clipping Constraint. 2024 International Technical Conference on Circuits/Systems, Computers, and Communications (ITC-CSCC), 2024, Pp. 1–4. DOI: 10.1109/ITC-CSCC62988.2024.10628189

    16. Stojanovic M., Preisig J. Underwater acoustic communication channels: Propagation models and statistical characterization. IEEE Communications Magazine, 2009, Vol. 47, No. 1, Pp. 84–89. DOI: 10.1109/MCOM.2009.4752682

    17. Oshiro S., Muller Y., Yamada H., Wada T. An UWA OFDM Communication System with Improved Doppler compensation and Initial Synchronization. OCEANS 2022, Hampton Roads, 2022, Pp. 1–6. DOI: 10.1109/OCEANS47191.2022.9977202

    18. Chilingarov A., Gelgor A. Power Allocation with Limited Feedback for Underwater Acoustic OFDM Communication Systems. 2025 International Conference on Electrical Engineering and Photonics (EEx-Polytech), 2025, Pp. 240–243. DOI: 10.1109/EExPolytech66949.2025.11251926

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