one preferred embodiment of the present invention provides a system and method for suppressing motion artifacts introduced by movement of a radar detection system . briefly described , in architecture , one embodiment of the system , among others , can be implemented as follows . the system includes a doppler radar module configured to transmit a microwave signal directed towards an object and receive the reflected microwave signals from the object and a living subject positioned behind the object . also , the system includes a reference module configured to transmit a reference signal towards the object and receive the reflected reference signal from the object . by comparing the two reflected signals from the doppler radar module and the reference device , a signal processor suppresses motion artifacts generated by movement of the doppler radar module to identify the presence of the living subject behind the object . other systems and methods are also provided .