Machine Learning Based Tuner for Frequency-Selective PAPR Reduction

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Frequency-selective peak-to-average power ratio (PAPR) reduction is essential in networks such as 5 G New Radio (NR) that support frequency-domain multiplexing of users and services. However, stemming from the frequency-selective shaping of the involved clipping noise, the relation between the intended PAPR target and the actually realized PAPR is known to be heavily nonlinear, which complicates the PAPR reduction. In this article, a novel machine learning (ML)-based solution, called PAPRer , is proposed to automatically and accurately tune the optimal PAPR target for frequency-selective PAPR reduction. This is achieved by utilizing the features related to the used clipping noise filter and minimization of the defined loss function, through supervised learning, which quantifies the PAPR target estimation accuracy. An analytical clipping noise power-based method is also devised for reference purposes. Extensive numerical evaluations in 5 G NR context are provided and analyzed, showing that PAPRer can very accurately predict and tune the optimal PAPR target. These results, together with the provided complexity assessment, demonstrate that the proposed PAPRer offers a favorable performance-complexity tradeoff in choosing the optimal PAPR target for frequency-selective PAPR reduction.

Original languageEnglish
Number of pages6
JournalIEEE Transactions on Vehicular Technology
Publication statusE-pub ahead of print - 18 Nov 2022
Publication typeA1 Journal article-refereed


  • 5 G NR
  • clipping and filtering
  • Filtering
  • Frequency division multiplexing
  • Frequency-domain analysis
  • Indexes
  • machine learning
  • OFDM
  • PAPR
  • Peak to average power ratio
  • power-efficiency
  • supervised learning
  • Time-domain analysis

Publication forum classification

  • Publication forum level 3

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Applied Mathematics


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