Gnss Technologies Inc.

Lighthouse Technology & Consulting Co., Ltd.

Jichi Medical University

Enabler Ltd.

Masahiro Asako

Hideyuki Torimoto

Makoto Ishii

Hiroaki Maeda

Satoshi Kogure

Yoichi Takahashi

Takahiro Shinohara

Kazuki Okano

Dinesh Manandhar

Masakazu Aihara

Yuzo Matsuzawa

Tomoyuki Miyano

Motohisa Kishimoto

Masumi Hirota

To provide a positioning technology capable of measuring a position of a moving object moving at high speed with high reliability, high accuracy, and high speed. The positioning systemcan obtain accurate position data using the positioning information collected from a plurality of base stations, and deliver the obtained accurate position data to the base station. In the positioning system, the base station serving as the position reference station can always hold the accurate position data based on the accurate measurement result data. In the positioning system, the base station whose accurate position is known is used as a position reference station to perform RTK positioning with, for example, the mobile station, thus allowing the position of the mobile station to be measured with high accuracy. Furthermore, in the positioning system, for example, the base station serving as the position reference station for RTK positioning can be switched together with the communication handover, thus allowing highly accurate positioning to be always performed even when the mobile station moves at high speed.

Positioning system, base station, and positioning method

An information management system includes: a mobile communication terminal capable of obtaining location information; and a medical institution provided with a regional medical data bank system and a transmitter. The mobile communication terminal transmits a space-time tag and a terminal ID to the system. The space-time tag is constituted of time information and location information. A space-time ID information processing unit of the system generates a space-time ID in a folder for each user based on a plurality of space-time tags and stores it in space-time ID information DB. A terminal device of the medical institution transmits the location information of the mobile communication terminal and the time information to the system. A verification processing unit verifies information from the mobile communication terminal against information from a utilization terminal and transmits the information to the utilization terminal when a request for transmission of the information is valid.

Information management system, mobile communication terminal, data bank device, service information management device, authentication device, data management method, mobile communication terminal control method, database control method, service information management method, and program

Provided is a navigation signal transmitter capable of ensuring reduction in frequency deviation of a terrestrially transmitted navigation signal at low cost. The navigation signal transmitter is operable to receive a transmission wave, generate a synchronization pulse in synchronization with a predetermined data frame, generate an internal clock fundamental oscillation by a reference signal synchronizing section () using the synchronization pulse as a reference signal, generate an IMES signal based on the internal clock fundamental oscillation, and transmit the IMES signal. The reference signal synchronizing section () comprises a counter circuit (), a comparator (), a low-pass control filter (), a D/A converter () and a voltage controlled oscillator (). The reference signal synchronizing section () is configured to, when a magnitude relationship between the number of clock pulses generated in the voltage controlled oscillator () using the synchronization pulse as the reference signal and a reference value falls within a predetermined value and continues a predetermined number of times in one direction, adjust a level of control voltage of the voltage controlled oscillator ().

Navigation signal transmitter and method for generating navigation signal

A navigation signal transmitting apparatus and a location information providing apparatus are provided for reducing time of positioning with a positioning signal from an indoor positioning transmitter. When an information providing server recognizes a transmitter ID of a transmitter from a mobile phone, the server makes reference refers to database associated with the transmitter ID, and reads SVG map information associated with the ID (including information for displaying a map and information of a correspondence relation between the transmitter ID and the location of the transmitter on the map). When the server transmits data of the SVG map information to a base station, the base station wirelessly emits the data of the SVG map information. When the mobile phone detects arrival of the data, the mobile phone can obtain the location of the transmitter from the data in accordance with a browsing operation of a user of the phone.

Navigation signal transmitting apparatus, location information providing apparatus, method for transmitting navigation signal, and method for providing location information

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

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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Tokyo, Japan

Masahiro Asako