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:
Oct. 20, 2020
Filed:
Aug. 31, 2016
Valeo Comfort and Driving Assistance, Créteil, FR;
Eric Leconte, Creteil, FR;
VALEO COMFORT AND DRIVING ASSISTANCE, Créteil, FR;
Abstract
A method for measuring a distance R separating a vehicle and an identifier for accessing and starting the vehicle includes N sequences Sq, p∈[1;N]. Each sequence Sqincludes: transmission, from a transmitter of the vehicle to a receiver of the identifier, of a first signal of frequency f; measurement, by a computer of the identifier, of a phase ϕ, modulo 2π, of the received first signal, in relation to a second signal of phase ϕ(t)=ϕ+2πft; transmission, from a transmitter of the identifier to a receiver of the vehicle, of the second signal; and calculation, by a computer of the vehicle, of a phase ϕ, modulo 2π, of the received second signal, in relation to the first signal; calculation of the average ϕof the phase ϕand of the phase ϕ.