US 12,007,466 B2
Three-dimensional and four-dimensional mapping of space using microwave and MM-wave parallax
Amirreza Safaripour, Pasadena, CA (US); Behrooz Abiri, Pasadena, CA (US); Florian Bohn, Pasadena, CA (US); and Seyed Ali Hajimiri, Pasadena, CA (US)
Assigned to GuRu Wireless, Inc., Pasadena, CA (US)
Filed by GuRu Wireless, Inc., Pasadena, CA (US)
Filed on Jan. 4, 2019, as Appl. No. 16/240,649.
Claims priority of provisional application 62/613,704, filed on Jan. 4, 2018.
Prior Publication US 2019/0204432 A1, Jul. 4, 2019
Int. Cl. G01S 13/50 (2006.01); G01S 7/282 (2006.01); G01S 13/48 (2006.01); G01S 13/89 (2006.01)
CPC G01S 13/505 (2013.01) [G01S 7/282 (2013.01); G01S 13/48 (2013.01); G01S 13/89 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method of determining an object's distance, the method comprising:
delivering a first RF signal from a first transmitter to the object;
changing a direction of the first transmitter along both azimuth and elevation until the first transmitter reaches a first direction defined by first and second angles at which a power of a first reflected RF signal reflected off the object and received by a receiver reaches a maximum value;
delivering a second RF signal from a second transmitter to the object;
changing a direction of the second transmitter along both azimuth and elevation until the second transmitter reaches a second direction defined by third and fourth angles at which a power of a second reflected RF signal reflected off the object and received by the receiver reaches a maximum value;
determining a distance between the object and the first transmitter in accordance with a distance between the two transmitters, and the first, second, third and fourth angles;
deactivating the second transmitter while delivering the first RF signal from the first transmitter; and
deactivating the first transmitter while delivering the second RF signal from the second transmitter.