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US Patent 11776334 Passive entry/passive start access systems including round trip time sniffing

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Contents

Patent abstractTimelineTable: Further ResourcesReferences
Is a
Patent
Patent

Patent attributes

Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
11776334
Patent Inventor Names
Yuki Tokunaga
Raymond Michael Stitt
Date of Patent
October 3, 2023
Patent Application Number
17170100
Date Filed
February 8, 2021
Patent Citations
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US Patent 10943417 Passive entry/passive start access systems including round trip time sniffing
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US Patent 10328899 Localization and passive entry / passive start systems and methods for vehicles
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US Patent 10328900 System and methods for vehicle passive keyless entry triggered by smartphone proximity detection
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US Patent 8644768 System, method, and circuit for distance measurement between two nodes of a radio network
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US Patent 9688247 Method and apparatus for digital temporary vehicle key utilization
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US Patent 9794753 System and method for establishing real-time location
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US Patent 9807570 Systems and methods for detecting proximity and location of a smartphone or other device to a vehicle
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US Patent 9825373 Monopatch antenna
...
Patent Primary Examiner
‌
Joseph H Feild
CPC Code
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B60R 25/245
Patent abstract

A system for includes master and sniffer devices. The master device includes: first antennas with different polarized axes; a transmitter transmitting a challenge signal via the first antennas from the vehicle to a slave device, where the slave device is a portable access device; and a receiver receiving a response signal in response to the challenge signal from the slave device. The sniffer device includes: second antennas with different polarized axes; and a receiver receiving, via the second antennas, the challenge signal from the transmitter and the response signal from the slave device. The sniffer device measures when the challenge signal and the response signal arrive at the sniffer device to provide arrival times. The master or sniffer device estimates at least one of a distance from the vehicle to the slave device or a location of the slave device relative to the vehicle based on the arrival times.

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