MIT researchers develop a radar system that locates people behind concrete walls

MIT Lincoln Laboratory researchers developed a new radar system that looks through walls.
This ultrawideband (UWB) multiple-input, multiple-output phased-array sensor has real-time acquisition and processing capability and provides video-like synthetic aperture radar (SAR) images of people moving behind a concrete wall. The system demonstrated the ability to capture meaningful imagery at a 10.8 Hz frame rate through 4-inch- and 8-inch-thick, as well as cinder block, walls from a standoff distance of approximately 20 feet.
(full article here)