TELECOMMUNICATION SYSTEM

WIPO Patent Application WO/2020/162033

A1

A fixed system has a location estimation unit for estimating the location of a portable device on the basis of an incident angle calculated on the basis of information measured by two or more antennas provided in a plurality of main communication modules. The location estimation unit estimates the location of the portable device on the basis of each incident angle on two main communication modules when there are two main communication modules for which the incident angle is known, estimates the location of the portable device on the basis of the incident angle on one main communication module and the reception radio wave intensity of a signal transmitted from the portable device when there is one main communication module for which the incident angle is known, and estimates the location of the portable device on the basis of the reception radio wave intensity of the signal transmitted from the portable device when there is no main communication module for which the incident angle is known.

KISHIMOTO YOSHIHISA (JP)
WAKANA KEIGO (JP)
TAKAI DAISUKE (JP)
YAMADA YUKIMITSU (JP)
NAKASATO MITSUHARU (JP)
SATO KAZUMA (JP)

PCT/JP2019/048268

August 13, 2020

December 10, 2019

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ALPS ALPINE CO LTD (JP)

G01S5/02; B60R25/24; E05B49/00; G01S11/04; G01S11/06

WO2018093060A1	2018-05-24
WO2013084030A1	2013-06-13
WO2018105225A1	2018-06-14

JP2018199971A	2018-12-20
JP2018178506A	2018-11-15
JP2016015724A	2016-01-28
JP5555347B1	2014-07-23
US20140308971A1	2014-10-16

ITOH, Tadashige et al. (JP)

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