公开(公告)号：US20210354662A1

公开(公告)日：2021-11-18

申请号：US17443534

申请日：2021-07-27

Applicant: ALPS ALPINE CO., LTD.

Inventor： Yoshihisa KISHIMOTO ,  Keigo WAKANA ,  Daisuke TAKAI ,  Yukimitsu YAMADA ,  Mitsuharu NAKASATO ,  Kazuma SATO

IPC: B60R25/24 ,  G01S5/02 ,  G01S11/06 ,  G01S11/04

Abstract: A remote communication system includes a portable device; and a fixed system. The fixed system includes main communication modules; and a position estimating unit configured to estimate a position of the portable device, based on an incident angle of a signal from the portable device, upon detecting the signal by antennas provided in the main communication modules. When there are two main communication modules for which the incident angle is known, the position of the portable device is estimated based on the incident angle. When there is one main communication module for which the incident angle is known, the position of the portable device is estimated based on the incident angle and a received radio wave intensity of the signal. When there is no main communication module for which the incident angle is known, the position of the portable device is estimated based on the received radio wave intensity.