Principles of UWB Multisite Radar Devicesfor Searching Survivors in Rubble

A combination of prospective ultrawideband (UWB) technology and multisite radar systems (MSRSs) technology is considered for detection and coordinate measurement of motionless survivors in rubble. Main attention is paid to effective detection of weak signals from a moving human chest due to breathing in a background of clutter (intensive reflections from environment) as well as to high accuracy of survivor position determination, especially its angle coordinates. Large signal attenuation and unknown additional delay of signals propagating through rubble are taken into account