US 12,270,894 B2
Up-sampling and cross-correlation for time of arrival determinations in passive entry/passive start systems
Raymond Michael Stitt, Ada, MI (US); and John Videtich, Zeeland, MI (US)
Assigned to DENSO International America, Inc., Southfield, MI (US); and DENSO CORPORATION, Kariya (JP)
Filed by DENSO International America, Inc., Southfield, MI (US); and DENSO CORPORATION, Kariya (JP)
Filed on Jun. 27, 2023, as Appl. No. 18/214,562.
Application 17/882,730 is a division of application No. 16/824,280, filed on Mar. 19, 2020, granted, now 11,428,799, issued on Aug. 30, 2022.
Application 18/214,562 is a continuation of application No. 17/882,730, filed on Aug. 8, 2022, granted, now 11,714,184.
Application 16/824,280 is a continuation in part of application No. 16/598,191, filed on Oct. 10, 2019, granted, now 10,991,182.
Claims priority of provisional application 62/826,212, filed on Mar. 29, 2019.
Claims priority of provisional application 62/826,239, filed on Mar. 29, 2019.
Claims priority of provisional application 62/823,210, filed on Mar. 25, 2019.
Claims priority of provisional application 62/801,392, filed on Feb. 5, 2019.
Claims priority of provisional application 62/744,814, filed on Oct. 12, 2018.
Prior Publication US 2023/0341540 A1, Oct. 26, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G01S 13/84 (2006.01); B60R 25/20 (2013.01); B60R 25/24 (2013.01); G07C 9/00 (2020.01); G01S 13/79 (2006.01)
CPC G01S 13/84 (2013.01) [B60R 25/209 (2013.01); B60R 25/24 (2013.01); B60R 25/241 (2013.01); B60R 25/248 (2013.01); G07C 9/00309 (2013.01); B60R 2325/101 (2013.01); B60R 2325/108 (2013.01); B60R 2325/205 (2013.01); G01S 13/79 (2013.01); G07C 2209/63 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An access system for a vehicle, the access system comprising:
a transmitter configured to transmit a first wireless signal from the vehicle to a portable access device via one or more antennas;
a receiver configured to receive a second wireless signal transmitted from the portable access device to the vehicle via the one or more antennas; and
a control module configured to determine a phase based on the first wireless signal and the second wireless signal, and to determine a location of the portable access device relative to the vehicle based on the phase,
wherein
the second wireless signal indicates a phase delay of the first wireless signal, and
the control module is configured to determine the location of the portable access device based on the phase delay.