Method for estimating and correcting a drift between clocks of a receiving transceiver and a corresponding emitting transceiver, and receiver for implementing said method

摘要

The present invention concerns a method for estimating and correcting a drift between a local clock of a receiving transceiver and a remote clock of a corresponding emitting transceiver, said receiving transceiver receiving electromagnetic signals from the emitting transceiver. The method of the invention comprises the steps of :- receiving by said receiving transceiver, a signal emitted by the emitting transceiver, said signal being formed of at least one symbol, each symbol being emitted within a time frame having a first duration $$ T_f^{\mathit{pre}};$$- sampling the energy of said received signal over a plurality of said time frames;- forming a matrix representative of the energy of said sampled signal;- determining from said energy matrix, points of maximum of energy within each of said time frames;- determining a straight line connecting a plurality of points of maximum of energy within each of said time frames;- determining a slope of said straight line;- calculating a time drift between the clock of the emitting transceiver and the clock of the receiving transceiver by using the slope of said straight line;- adjusting the frequency of the receiving transceiver's clock according to the calculated time drift.;The invention also concerns a receiver for implementing said method.