The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 19, 2019
Filed:
Jan. 24, 2018
Ahmad N Saleh, Rochester Hills, MI (US);
Donald W Grimaudo, Rochester Hills, MI (US);
Jerry M Nasiadka, Rochester Hills, MI (US);
Ahmad N Saleh, Rochester Hills, MI (US);
Donald W Grimaudo, Rochester Hills, MI (US);
Jerry M Nasiadka, Rochester Hills, MI (US);
FCA US LLC, Auburn Hills, MI (US);
Abstract
A passive entry system of a vehicle includes relay attack prevention. The passive entry system includes a control module in the vehicle, at least one antenna at the vehicle and a key fob. A predetermined number of signals are transmitted via the at least one antenna with each signal having a different power strength. The key fob is determines a power strength of each signal that the key fob receives and generates a measurement report to transmit to the control module. The control module is configured to determine whether the measurement report contains received signal strength indicators for at least half of the predetermined number of signals and whether the received signal strength indicator for each signal contained in the measurement report correlates to the power strength of that signal as transmitted by the at least one antenna.