3D Imaging from Multipath Temporal Echoes

Echo-location is a broad approach to imaging and sensing that includes both man-made RADAR, LIDAR, SONAR also animal navigation. However, full 3D information based on echo-location requires some form of scanning the scene in order provide spatial location echo origin-points. Without this information, objects very challenging task as inverse retrieval problem strongly ill-posed. Here, we show temporal encoded return echoes are reflected multiple times within sufficient faithfully render an image 3D. Numerical modelling theoretic perspective prove concept insight into role multipath information. We experimentally demonstrate by using radio-frequency acoustic waves for individuals moving closed environment.