Abstract: A device for detecting non-phase-modulated pulsed signals includes at least one amplifier receiving a radiofrequency signal, and restoring at least one first signal representative of the envelope of the input signal, and a second normalized signal, characterized in that a module for estimating the stability of the phase includes means for estimating the phase of the radiofrequency signal, and means for evaluating the temporal stability of the phase, the presence of a characteristic pulse being detected if the phase is stable according to determined criteria.

Abstract: A device for detecting non-phase-modulated pulsed signals includes at least one amplifier receiving a radiofrequency signal, and restoring at least one first signal representative of the envelope of the input signal, and a second normalized signal, characterized in that a module for estimating the stability of the phase includes means for estimating the phase of the radiofrequency signal, and means for evaluating the temporal stability of the phase, the presence of a characteristic pulse being detected if the phase is stable according to determined criteria.

Abstract: A device for detecting non-phase-modulated pulsed signals or sequences of pulses of a determined frequency includes means for detecting tangling of pulses, at least one amplifier receiving a radiofrequency signal, and restoring at least one first signal representative of the envelope of the input signal, and a second normalized signal. A phase jump estimation module includes means for estimating the phase of the radiofrequency signal, means for evaluating a phase jump, the presence of pulse tangling being detected if the phase jump is of a greater value than a determined threshold value.

Abstract: A method for transmitting data between a responder and an interrogator communicating in a secure mode includes the interrogator transmitting an interrogation signal comprising an authentication sequence to the responder which replies to the interrogator with a signal subjected to a time delay depending on said authentication sequence. A message for selection of the type of data to be transmitted is inserted into said interrogation signal, the responder decoding said selection message in order to transmit the selected data to the interrogator, said data being formatted in the form of standard identification codes so as to be masked.