Karabulut Kurt, GüneşŞenyuva, Rıfat Volkan2024-07-122024-07-122021Şenyuva, R.V. ve Kurt, G. K. (2021). Harmonic retrieval of CFO and frame misalignment for OFDM-based inter-satellite links. IEEE, 2021 17th International Symposium on Wireless Communication Systems (ISWCS). s.1-5.978-1-7281-7432-72154-022510.1109/ISWCS49558.2021.95621772-s2.0-85118146770https://ieeexplore.ieee.org/document/9562177https://doi.prg/10.1109/ISWCS49558.2021.9562177https://hdl.handle.net/20.500.12415/3223As dense low Earth orbit (LEO) constellations are being planned, the need for accurate synchronization schemes in high-speed environments remains a challenging problem to tackle. To further improve synchronization accuracy in channeling environments, which can also be applied in the LEO networks, we present a new method for estimating the carrier frequency offset (CFO) and frame misalignment in orthogonal frequency division multiplexing (OFDM) based inter-satellite links. The proposed method requires the transmission of pilot symbols to exploit 2-D estimation of signal parameters via rotational invariance techniques (ESPRIT) and estimate the CFO and the frame misalignment. The Cramer-Rao lower bounds (CRLB) of the joint estimation of the CFO and frame misalignment are also derived. Numerical results show that the difference between the proposed method and the state-of-art method is less than 5dB at its worse.enAttribution-NonCommercial-ShareAlike 3.0 United Statesinfo:eu-repo/semantics/openAccessFrequency synchronizationTiming synchronizationDoppler shiftHarmonic retrievalInter-satellite linksConference Object5N/A1