Gnss Technologies Inc.

Lighthouse Technology & Consulting Co., Ltd.

Satoshi Kogure

Hideyuki Torimoto

Makoto Ishii

Masahiro Asako

Hiroaki Maeda

Kazuki Okano

Dinesh Manandhar

Tomoyuki Miyano

Motohisa Kishimoto

Provided is a position information providing system which can reduce a time required for acquiring position information. An indoor transmitter is adapted to provide position information by using a second positioning signal compatible with a first positioning signal which is a spread spectrum signal from each of a plurality of satellites. The indoor transmitter includes an EEPROM which stores therein position data for identifying an installation location thereof, an FPGA operable to generate a second positioning signal including the position data as a spread spectrum signal, and a transmitting section operable to transmit the spread spectrum signal. The second positioning signal is generated to repeat the same content in a cycle shorter than that of the first positioning signal.

Position information providing system indoor transmitter and method for providing position information

An indoor transmitter is capable of programmably changing a format of a transmitter signal. A process to be performed by a position information providing apparatus comprises the step of acquiring a received positioning signal, and the step of identifying an emission source of the positioning signal, wherein, if the emission source of the positioning signal is an outdoor source, the process further comprises the step of acquiring a navigation message included in the positioning signal, and the step of performing a processing for calculating a position based on the signal, or, if the emission source of the positioning sign is an indoor source, the process further comprises the step of acquiring message data from the positioning signal, the step of acquiring coordinate values from the data, and the step of displaying position information based on the coordinate values.

Positional information is provided at a place out of reach of radio wave. The process executed by a positional information providing apparatus includes the steps of: obtaining a received positioning signal; specifying an emission source of the positioning signal; obtaining, when the emission source of the positioning signal is outdoors, a navigation message included in the positioning signal; executing a process for calculating the position based on the signal; obtaining, when the emission source of the positioning signal is indoors, message data from the positioning signal; obtaining coordinate values from the data; and displaying positional information based on the coordinate values.

Positional information providing system, positional information providing apparatus and transmitter

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Tsukuba, Japan

Satoshi Kogure