| 摘要 |
A method of recovering a carrier for modulations with several phase states, especially QPSK modulations, in which received symbols S, consisting of first codes X, Y are made to undergo a non-linear conversion in conversion means (20, 30, 50, 60) in order to supply an instantaneous phase-shift angle for a particular symbol, and the instantaneous phase-shift angles obtained are accumulated (70) for the various symbols preceding the particular symbol in order to supply an estimated phase angle Theta est, so as to calculate the codes X est, Y est constituting the particular symbol, decided on the basis of the first codes X, Y of the delayed particular symbol and of the said estimated phase angle in order to correct a phase offset in the carrier. A device for implementing the said method. <IMAGE>
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