Application of 5G new radio for satellite links with low peak‐to‐average power ratios
Saarnisaari, Harri; de Lima, Carlos Morais (2020-09-30)
Saarnisaari, H, de Lima, C. Application of 5G new radio for satellite links with low peak-to-average power ratios. Int J Satell Commun Network. 2021; 39: 445– 454. https://doi.org/10.1002/sat.1378
© 2020 John Wiley & Sons, Ltd. This is the peer reviewed version of the following article: Saarnisaari, H, de Lima, C. Application of 5G new radio for satellite links with low peak-to-average power ratios. Int J Satell Commun Network. 2021; 39: 445– 454. https://doi.org/10.1002/sat.1378, which has been published in final form at https://doi.org/10.1002/sat.1378]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
https://rightsstatements.org/vocab/InC/1.0/
https://urn.fi/URN:NBN:fi-fe2020111790829
Tiivistelmä
Summary
The aim of the paper is to consider feasibility of 5G new radio (NR) over satellite links also known as nonterrestrial networks (NTNs). Large propagation delay and Doppler frequency shift are challenges like is high peak‐to‐average power ratio (PAPR) of 5G NR signal because satellite systems would like to operate at very low‐power amplifier back‐off values. This paper provides a brief summary of progress made in initial synchronization and uplink random access process both in the literature and standardization. Furthermore, the paper explains what is the relationship between low PAPR and power amplifier back‐off and the density of reference symbols by showing that 2‐dB back‐off values can be attained using sufficient reference symbol density. Finally, open issues that need clarification are listed. Interestingly, all solutions to these problems do not mean changes in the standard but proper actions from vendors and operators.
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