公开(公告)号：US20250028040A1

公开(公告)日：2025-01-23

申请号：US18908291

申请日：2024-10-07

Applicant: DENSO CORPORATION

Inventor： Ryosuke KANBAYASHI ,  Kazuhiro Nakashima ,  Chiharu Yamano ,  Hiromitsu Ohba

IPC: G01S13/76 ,  B60R25/24 ,  B60R25/31

Abstract: A position estimation system determines the location of a mobile device relative to a vehicle by wirelessly communicating with the device. The system includes multiple communicators installed at different positions in the vehicle, and a communication controller that manages these communicators. The communication controller collects signal reception strength and a time-of-flight related value from the mobile device. This time-of-flight value indicates the travel time of radio waves between the communicators and the mobile device. A position estimation unit corrects this time-of-flight value using a correction function based on teaching data that includes device positions, signal strengths, and time-of-flight values. The corrected time-of-flight value is used to estimate the mobile device's position. The data volume of the correction function is smaller than that of the teaching data.