An OTFS-modulated ZC preamble with a dual-system detector jointly estimates delay and Doppler in GNSS-free LEO NTN, offering CP-free operation.
Location-Based Timing Advance Estimation for 5G Integrated LEO Satellite Communications,
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An OTFS-based Random Access Scheme for GNSS Independent Operation in NTN
An OTFS-modulated ZC preamble with a dual-system detector jointly estimates delay and Doppler in GNSS-free LEO NTN, offering CP-free operation.