Method for setting up a modem comprising a variable phase echo canceller and modem in which such a method is implemented.

摘要

P This method is applied to a modem having a data transmission port (45) for transmitting symbols to a remote device, a receiving port (46) for receiving symbols from that remote device, means for receiving echo cancellers constituted by filtering means (50, 54) having adjustable coefficients and cascading phase-shifting means (56) for providing information from said transmission access, filtered out-of-phase to a subtraction means (58); , 52) for removing from the reception access data said filtered out-of-phase information, a control means for acting on the filtering means and the phase-shifting means for canceling at the output of the subtraction means any echo. BR/ This method proposes the following steps: BR/ - estimation of the energy of the echo during a time corresponding to a certain number of symbols, BR/ - allocation of this energy to a number of forms simple BR/ - continued adjustment of the coefficients and the phase shift element by means of said assignment. BR/ Application: data transmission. / P