US 12,221,067 B2
Antenna switching control for AOA capturing in phone-as-a-key systems with de-whitened tone transmission, CRC based validation and event timing
Raymond Michael Stitt, Ada, 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 Mar. 22, 2024, as Appl. No. 18/614,309.
Application 18/614,309 is a continuation of application No. 17/984,837, filed on Nov. 10, 2022, granted, now 11,938,899.
Application 17/984,837 is a continuation of application No. 17/007,152, filed on Aug. 31, 2020, granted, now 11,498,520, issued on Nov. 15, 2022.
Claims priority of provisional application 62/902,844, filed on Sep. 19, 2019.
Claims priority of provisional application 62/900,114, filed on Sep. 13, 2019.
Prior Publication US 2024/0227732 A1, Jul. 11, 2024
Int. Cl. B60R 25/24 (2013.01); G01S 3/46 (2006.01); G06K 7/10 (2006.01); G07C 9/29 (2020.01); H01Q 3/24 (2006.01); H04L 9/40 (2022.01); H04W 4/20 (2018.01); H04W 4/40 (2018.01); B60R 25/01 (2013.01)
CPC B60R 25/245 (2013.01) [G01S 3/46 (2013.01); G06K 7/10366 (2013.01); G07C 9/29 (2020.01); H01Q 3/24 (2013.01); H04L 63/1466 (2013.01); H04W 4/20 (2013.01); H04W 4/40 (2018.02); B60R 25/01 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A reader comprising:
a first transceiver configured to, during a current connection event, detect a first message transmitted from a portable access device to a second transceiver at a phone-as-a-key (PaaK) system of an object, wherein the first message is transmitted to establish a communication link between the portable access device and the second transceiver of the PaaK system, wherein the first transceiver is implemented at the reader and the reader is separate from the portable access device and the PaaK system, and wherein the reader is separate from the second transceiver; and
a first control module configured to
monitor via a first antenna a Gaussian frequency shift keying (GFSK) signal transmitted between the portable access device and the PaaK system and associated with a packet of the first message transmitted between the portable access device and the PaaK system,
based on the GFSK signal, perform antenna switching to switch from the first antenna to a second antenna,
monitor via the second antenna at least a portion of a second message transmitted between the portable access device and the PaaK system, and
determine a parameter based on the GFSK signal and the at least a portion of the second message, and
indicate the parameter to the PaaK system for permitted access determined by the PaaK system.