ON ESTIMATING THE TIME SHIFT OF A RANDOM PERIODIC OFDM SIGNAL

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Resumo

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.

Sobre autores

G. Golubev

Kharkevich Institute for Information Transmission Problems of the Russian Academy of Sciences

Email: golubev.yuri@gmail.com
Moscow

V. Potapov

Kharkevich Institute for Information Transmission Problems of the Russian Academy of Sciences

Email: potapov@iitp.ru
Moscow

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