We propose here a Doppler-radar implementation at 60 GHz for contactless monitoring of vital signs (respiration and heartbeat). In order to provide a real-time detection of non-stationary vital signs and critical events, an estimation technique is here used by means of a wavelet transform of the received signals. Moreover, the amplitudes of the relevant vital movements can be deduced by the wavelet transform so as to distinguish the useful signal from noises and non-desired movements.