Channel impulse response estimation using received signal variance

This invention made a equipment (1), for processing through transmission channel (4) sent came of has receives signal, by in equipment including: Gets device (2A), based on by in has receives signal (y), obtained by in transmission channel (4) of estimated of response function (h+e); export device (2B), export by in has receives signal (y) of estimated variance (δ 2); and modified device (2c), through will by in estimated variance (δ 2) application to by in estimated of response function (h+e), To modify the estimated response function described in (h+e), the resulting modified impulse responses (h). The invention also suggest an appropriate method.