US 9,915,730 B2
Method and system for through-the-wall radar imaging
Hassan Mansour, Boston, MA (US); and Ulugbek S. Kamilov, Cambridge, MA (US)
Assigned to Mitsubishi Electric Research Laboratories, Inc., Cambridge, MA (US)
Filed by Mitsubishi Electric Research Laboratories, Inc., Cambridge, MA (US)
Filed on Jul. 23, 2015, as Appl. No. 14/807,063.
Prior Publication US 2017/0023673 A1, Jan. 26, 2017
Int. Cl. G01S 13/02 (2006.01); G01S 13/89 (2006.01); G01S 13/88 (2006.01)
CPC G01S 13/89 (2013.01) [G01S 13/888 (2013.01); G01S 2013/0245 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for generating an image of a scene behind a wall, wherein the scene is represented as a grid, comprising steps:
transmitting a radar pulse through the wall using a transmitter;
receiving, in a receiver at a known location, a set of echoes corresponding to the radar pulse being reflected by the scene;
determining, based on the location, an imaging operator that relates the set of echoes to the grid;
obtaining, using the imaging operator, a sparse delay kernel that matches a response of a current image to a similar response in the set of echoes;
updating the current image, based on the set of echoes, the imaging operator, and the sparse delay kernel; and
repeating the transmitting, the receiving, the determining, the obtaining, and the updating steps for different known locations until a termination condition is reached, and wherein the determining, the obtaining, and the updating steps are performed in a processor.