US 11,743,683 B2
System and method of calibration for establishing real-time location
Eric J. Smith, Holland, MI (US); R. Michael Stitt, Ada, MI (US); and Karl Jager, Zeeland, MI (US)
Assigned to DENSO International America, Inc., Southfield, MI (US)
Filed by DENSO International America, Inc., Southfield, MI (US)
Filed on Jun. 11, 2021, as Appl. No. 17/345,599.
Application 17/345,599 is a continuation of application No. 16/713,354, filed on Dec. 13, 2019, granted, now 11,039,276.
Claims priority of provisional application 62/779,859, filed on Dec. 14, 2018.
Prior Publication US 2021/0306801 A1, Sep. 30, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G08B 1/08 (2006.01); H04W 4/02 (2018.01); H04W 4/40 (2018.01); H04B 17/21 (2015.01); B60R 25/24 (2013.01); H04B 17/318 (2015.01)
CPC H04W 4/026 (2013.01) [B60R 25/245 (2013.01); H04B 17/21 (2015.01); H04B 17/318 (2015.01); H04W 4/40 (2018.02); B60R 2325/20 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A system for obtaining location data for a portable device relative to an object, the system comprising:
an object device system including one or more devices disposed in fixed positions relative to the object, the one or more object devices having an antenna configured to at least one of transmit and receive wireless communications with respect to the portable device;
a control system configured to obtain first and second sets of one or more samples pertaining to time of flight for communications between the portable device and the object device system, the control system configured to obtain the first set of one or more samples with respect to the portable device and first communications according to a first communication protocol, the control system configured to obtain the second set of one or more samples with respect to the portable device and second communications according to a second communication protocol, wherein the first set of one or more samples and the second set of one or more samples both pertain to time of flight for communications, wherein the first and second communication protocols are different; and
said control system including a locator operable to determine a location of the portable device relative to the object, the locator operable to determine the location of the portable device based on the first and second sets of one or more samples pertaining to time of flight respectively for first and second communications.