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1. (WO2018158113) METHOD FOR ESTIMATING A CLOCK SKEW BETWEEN A TRANSMITTER AND A RECEIVER

Pub. No.:    WO/2018/158113    International Application No.:    PCT/EP2018/054184
Publication Date: Sat Sep 08 01:59:59 CEST 2018 International Filing Date: Wed Feb 21 00:59:59 CET 2018
IPC: H04B 1/7073
Applicants: SAFRAN ELECTRONICS & DEFENSE
Inventors: CHIODINI, Alain
Title: METHOD FOR ESTIMATING A CLOCK SKEW BETWEEN A TRANSMITTER AND A RECEIVER
Abstract:
Method for estimating a clock skew between a transmitter and a receiver during a transmission, on a communication channel, of a second communication signal resulting from applying a spread spectrum technique using a signal, termed spreading signal, to a first communication signal. The method comprises, subsequent to the reception of the second signal by the receiver: obtaining (311) a signal, termed orthogonal spreading signal, orthogonal to the spreading signal; applying (312) said orthogonal spreading signal obtained to the second signal received by the receiver so as to obtain a third signal; obtaining (313) an estimation of a ratio of energy per bit to power spectral density of communication noise that has affected the second signal during its transmission on the basis of the third signal; and, estimating an information item representative of the clock skew between the transmitter and the receiver on the basis of of the estimation of said ratio.