Systems and methods for detecting biometrics using a life detecting radar are disclosed. Life detecting radars can include transmit antennas configured to transmit continuous microwave (“CW”) radio signals that reflect back upon making contact with various objects. The life detecting radars can identify victims by analyzing data with respect to a victims breathing and heartbeat patterns. In some embodiments, to identify victims, the return signal may be split into a heartbeat band and a breathing band using bandpass filtering. The life detecting radar system may perform parameter estimation for the breathing band and/or the heartbeat band using a non-least squares process (NLS). The life detecting radar system may analyze breathing and heartbeat results based on the heartbeat FM frequency and the breathing center frequency to identify victims.
