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NB-IoT, short for NarrowBand IoT, is a communication standard for long-range connectivity of numerous devices. A key research area in NB-IoT is reducing Peak-to-Average Power Ratio (PAPR). NB-IoT builds on 4G LTE (Long Term Evolution) and employs Single Carrier Frequency Division Multiple Access (SC-FDMA) in UpLink (UL) to minimize PAPR. To address power amplifier non-linearities, we propose applying the “clipping” technique, borrowing from OFDM. In this paper, we examine the impact of Clipping Factor (CF) on PAPR reduction and the attenuation factors of Raised-Cosine (RC) filter and the Root Raised-Cosine (RRC) filter on PAPR probability distribution. Our analysis demonstrates a 2.5 dB (33.33%) reduction at a cumulative distribution function of \(10^{-3}\) , with better results when using the Raised-Cosine (RC) filter.

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Enhancing Power Efficiency in NB-IoT Networks: PAPR Reduction in SC-FDMA

  • 会议论文

  • 发表日期：

    2025年

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  • Désiré Guel,
  • P. Justin Kouraogo,
  • Boureima Zerbo,
  • Modeste Dembele

摘要

NB-IoT, short for NarrowBand IoT, is a communication standard for long-range connectivity of numerous devices. A key research area in NB-IoT is reducing Peak-to-Average Power Ratio (PAPR). NB-IoT builds on 4G LTE (Long Term Evolution) and employs Single Carrier Frequency Division Multiple Access (SC-FDMA) in UpLink (UL) to minimize PAPR. To address power amplifier non-linearities, we propose applying the “clipping” technique, borrowing from OFDM. In this paper, we examine the impact of Clipping Factor (CF) on PAPR reduction and the attenuation factors of Raised-Cosine (RC) filter and the Root Raised-Cosine (RRC) filter on PAPR probability distribution. Our analysis demonstrates a 2.5 dB (33.33%) reduction at a cumulative distribution function of \(10^{-3}\) , with better results when using the Raised-Cosine (RC) filter.