US 11,871,233 B2
System and method for proximity detection with single-antenna device
Timothy J. Pierson, Hanover, NH (US); Ronald Peterson, Brattleboro, VT (US); and David F. Kotz, Lyme, NH (US)
Assigned to Trustees of Dartmouth College, Hanover, NH (US)
Appl. No. 17/050,764
Filed by Trustees of Dartmouth College, Hanover, NH (US)
PCT Filed Apr. 26, 2019, PCT No. PCT/US2019/029395
§ 371(c)(1), (2) Date Oct. 26, 2020,
PCT Pub. No. WO2019/210201, PCT Pub. Date Oct. 31, 2019.
Claims priority of provisional application 62/663,543, filed on Apr. 27, 2018.
Prior Publication US 2021/0235273 A1, Jul. 29, 2021
Int. Cl. H04W 12/122 (2021.01); H04W 4/80 (2018.01); G01S 5/02 (2010.01); G16Y 40/50 (2020.01); G16Y 40/60 (2020.01)
CPC H04W 12/122 (2021.01) [G01S 5/0284 (2013.01); H04W 4/80 (2018.02); G01S 2205/07 (2020.05); G16Y 40/50 (2020.01); G16Y 40/60 (2020.01)] 22 Claims
OG exemplary drawing
 
1. A non-transitory computer readable medium storing instructions executable by at least one processor, the instructions, when executed by said processor, cause said processor to operate with a single antenna to:
receive a wireless signal comprising at least one frame, each of said frame comprising a repeating portion;
determine a difference of phase and amplitude of the repeating portion; and
determine whether the wireless signal is transmitted from a trusted source based at least in part on the difference of phase and amplitude of the repeating portion.