Patent ID: 8369512

Claim:
A divergence detection device for an adaptive system including a filter, the divergence detection device comprising: means for calculating the energy of an input signal of the filter, means for calculating the energy of an output signal of the filter, means for analysing the energy of the input signal and of the output signal so as to detect a rise in the energy of the output signal, relative to the energy of the input signal, in case of divergence of the adaptive system, means for calculating a ratio between the energy of the output signal and the energy of the input signal, means of comparison for comparing the ratio calculated with a threshold value corresponding to a divergence of the adaptive system, means for resetting coefficients of the filter to zero or for restoring the coefficients to a state corresponding to a convergence, when the ratio between the energy of the output signal and the energy of the input signal is greater than the threshold value, means for counting up/down intended to be incremented and decremented as a function of the results of the comparison carried out by the means of comparison, and means for comparing a count value of the up/down counter with a divergence detection threshold value.