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Future 6G networks will be able to support a wide range of services with different technical requirements and in different frequency bands. To achieve this goal, the use of radio over fiber (RoF) technology is an important foundation for both the transport architecture and the hybrid radio-optical centralized architecture or 6G fronthaul cloud radio access network (CRAN). At the same time, the 6G generated signal processing technologies and modulation schemes must meet the stringent requirements of a mobile data network. In this paper we estimate energy efficiency of DFT-s-OFDM in RoF systems in terms of peak-to-average power ratio (PAPR).
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Sultanov et al. (2023) studied this question.