New method helps WiFi read through walls

https://techxplore.com/news/2023-09-method-wifi-walls.html

"Geometrical Theory of Diffraction and corresponding Keller cones trace still object's edges... imaging the alphabet... if existence of edge determined, edge orientation best matching resulting Keller cone-based signature is chosen for given point... surface curvature, edge orientation, distance to receiver grid, and transmitter location... new directions for RF imaging"

Related: Team develops new method for communicating around arbitrary opaque walls
https://phys.org/news/2023-11-team-method-communicating-arbitrary-opaque.html