US 12,335,899 B2
Simultaneous localization and synchronization across multiple antennas
Mohammad Khojastepour, Lawrenceville, NJ (US); Ramanujan Sheshadri, Jersey City, NJ (US); and Md. Shaifur Rahman, Plainsboro, NJ (US)
Assigned to NEC Corporation, Tokyo (JP)
Filed by NEC Laboratories America, Inc., Princeton, NJ (US)
Filed on Jul. 5, 2022, as Appl. No. 17/857,626.
Claims priority of provisional application 63/218,590, filed on Jul. 6, 2021.
Prior Publication US 2023/0026160 A1, Jan. 26, 2023
Int. Cl. H04W 64/00 (2009.01); H04L 43/0864 (2022.01)
CPC H04W 64/00 (2013.01) [H04L 43/0864 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A computer-implemented method for identifying a device position, comprising:
synchronizing a clock between a first device and a second device to obtain a synchronized clock;
measuring a round-trip time of flight between an antenna from the first device and an antenna from the second device based on the synchronized clock;
estimating a relative angular position of the second device with respect to the first device based on the round-trip time of flight;
estimating a distance between the first device and the second device based on estimated round-trip time of flight; and
estimating, by the first device, a position of the second device with respect to a known coordinate based on the relative angular position and the distance.