| 摘要 |
Disclosed is a method to correct the drift in the phase shift (DELTA&PHgr;,theta) between two signals (S1) and (S2), said signals being generated by a signal having a reference frequency Fe or a corresponding period OMEGA, the drift in the phase shift resulting from a drift in frequency Fe or in period, according to a given relationship R((F,OMEGA), (theta, DELTA&PHgr;)). The method comprises at least the following steps: determining the value of the phase shift (DELTA&PHgr;, theta) from the phase &PHgr;1 of the signal S1 and the phase &PHgr;2 of the signal S2, estimating Fest the value of frequency Fe, or the corresponding period OMEGA, bringing this value (DELTA&PHgr;, theta) to a value within an interval of given values [QDMmin, QDMmax] containing the value QDM(Fe) obtained for the reference value Fe in taking account of the values DELTA&PHgr; and Fest and of the given relationship R((F,OMEGA),(theta,DELTA&PHgr;)). Application to reducing the variation of the QDM of a radio navigation system.
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