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Journal of Radio Electronics Online scientific journal · eISSN 1684-1719
2025, № 7 · RADIO WAVE PROPAGATION

Development and research of a method for frequency offset compensation based on the based on the use of unique words in 5G and 6G satellite communication systems

R.O. Salnikov1, I.K. Meshkov1, A.R. Gizatulin1, A.K. Sultanov1, A.L. Timofeev1, A.G. Meshkova1

1 Ufa University of Science and Technology, Russia
Full text DOI: 10.30898/1684-1719.2025.7.10 UDC 621.376.9 EDN TDZEXK

Abstract

This paper presents a method for Peak-to-Average Power Ratio (PAPR) reduction in hybrid satellite communication networks utilizing orthogonal access methods and shaping filters. The proposed approach combines flexible guard intervals and shaping filtering techniques to optimize signal transmission in low-orbit satellite networks. Several filter types are investigated, including Raised Cosine (RC), Root Raised Cosine (RRC), Band-Tuned Raised Cosine (BTRC), and its optimized version (OBTRC). The method is evaluated using OFDM, OFDMA, and DFT-s-OFDM variants with zero-tail and unique word modifications. Simulation results demonstrate a PAPR reduction of 2-4 dB compared to conventional approaches, with DFT-s-OFDM-based technologies exhibiting superior performance even under challenging channel conditions with Doppler shift.

  • ofdm
  • DFT-s-OFDM
  • 5g
  • 6g
  • Unique Word
  • Zero-tail
  • low-orbit satellites
  • converged telecommunication systems
Аннотация (на русском)

Разработка и исследование метода компенсации частотного рассогласования на основе использования уникальных слов в системах спутниковой связи 5G и 6G

В работе исследуется применение технологии уникальных слов (Unique Word, UW) для оценки и компенсации частотного рассогласования в спутниковых системах связи пятого и шестого поколений. Проведено сравнение различных последовательностей для генерации UW (Фрэнка, Уолша-Адамара, Задова-Чу и фазового псевдошума) в каналах с белым гауссовским шумом и многолучевым распространением. Результаты моделирования показывают, что последовательности Уолша-Адамара и фазового псевдошума обеспечивают снижение среднеквадратической ошибки на 15-20% при оптимальном разнесении 360 кГц, демонстрируя высокую эффективность при значительном доплеровском сдвиге.

For citation

Salnikov R.O., Meshkov I.K., Gizatulin A.R., Sultanov A.K., Timofeev A.L., Meshkova A.G. Development and research of a method for frequency offset compensation based on the based on the use of unique words in 5G and 6G satellite communication systems // Journal of Radio Electronics. – 2025. – No. 7. https://doi.org/10.30898/1684-1719.2025.7.10

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