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ON ESTIMATING THE TIME SHIFT OF A RANDOM PERIODIC OFDM SIGNAL
- Authors: Golubev G.K1, Potapov V.G1
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Affiliations:
- Kharkevich Institute for Information Transmission Problems of the Russian Academy of Sciences
- Issue: Vol 61, No 2 (2025)
- Pages: 30-49
- Section: Methods of Signal Processing
- URL: https://journal-vniispk.ru/0555-2923/article/view/316643
- DOI: https://doi.org/10.7868/S3034583925020033
- ID: 316643
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Abstract
We consider the problem of estimating the time shift of an unknown, random, wideband OFDM signal with N subcarriers and periodic synchronization insertions. The signal is assumed to be observed against a background of white Gaussian noise, and a small amount of received data is used to construct the estimate. Such problems arise in geolocation using low-orbit satellite constellations. To estimate the maximum posterior probability (MPP) of the time shift, we find its limiting distribution as N → ∞ and investigate its large deviations using the method of fractional derivatives.
About the authors
G. K Golubev
Kharkevich Institute for Information Transmission Problems of the Russian Academy of Sciences
Email: golubev.yuri@gmail.com
Moscow
V. G Potapov
Kharkevich Institute for Information Transmission Problems of the Russian Academy of Sciences
Email: potapov@iitp.ru
Moscow
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