Falko Dressler

Target detection via radar is a fundamental sensing capability, but at mmWave frequencies visibility in non-line-of-sight (NLOS) is sharply limited by obstacles and high attenuation. Reconfigurable intelligent surfaces (RIS) are widely proposed as a solution to this. However, many approaches either address moving targets, exploiting motion-induced changes in multipath, or are only evaluated in simulation. In this demo, we present a software-defined radio testbed, in which an RIS enables a monostatic radar to detect a static, passive target in NLOS. Detection is performed through a low-cost differential per-RIS-angle between a reference and target-present measurements. Attendees can process real measurements and observe how RIS beam steering exposes an otherwise undetectable target, illustrating the potential of programmable wireless environments for practical NLOS sensing.