It is an object of the present invention to perform positioning at favorable positioning precision and in a favorable positioning time, according to whether a receiver is indoors or outdoors. A positioning server 10 comprises a reception state information acquisition component 12 that acquires reception state information indicating the reception state of a radio wave at a cellular terminal 20, a base station positioning calculator 13 that estimates the position of the cellular terminal 20 on the basis of the reception state information, an end decision component 14 that decides whether or not to end the position estimation on the basis of a specific end condition, and, if it is decided not to end, estimates the position of the cellular terminal 20 on the basis of new reception state information, an indoor/outdoor determination component 15 that determines whether the cellular terminal 20 is indoors or outdoors on the basis of the reception state information, and an end condition determination component 16 that determines the specific end condition on the basis of a result of determination by the indoor/outdoor determination component 15.

Positioning System and Positioning Method

PROBLEM TO BE SOLVED: To provide a moving route estimation device for mobile capable of estimating a three-dimensional moving route, moving state and moving means. SOLUTION: The operating state of a mobile is measured from the information from an acceleration sensor 2, an angular velocity sensor 3, and an atmospheric pressure sensor 4, and the position of the mobile is measured from PHS 6 and GPS 5. These pieces of measurement information are fused within a PC 13, whereby the specification of the moving route or moving means or the estimation of the moving state is performed. This is performed in reference to the characteristic of waveform amplitude of the data measured by the acceleration sensor 2 provided on the PC 13 or the waveform characteristic of a power spectrum. COPYRIGHT: (C)2002,JPO

Moving route estimation device for mobile

The invention provides a navigating apparatus and a navigating method. The navigating apparatus comprises a GPS module and a processing module. The navigating method comprises steps that: displacement changes of a vehicle are detected, and it is determined that whether a displacement change exceeds a preset range; when the displacement change of the moving vehicle exceeds the preset range, an updating notice is transmitted; then the vehicle positional information of the navigating apparatus is updated. With the navigating apparatus and the navigating method provided by the invention, an updating notice is transmitted only when the displacement change or a moving speed change exceeds a preset range. Therefore, usage frequency of the processing module is reduced, such that the endurance of a battery is prolonged.

Navigating apparatus and navigating method

A positioning device and a positioning method thereof are provided. The positioning device can cooperate with a first satellite group and a second satellite group, and it comprises a storage, a receiver and a processor. The receiver is configured to receive a first satellite group signal from the first satellite group and a second satellite group signal from the second satellite group. The processor is electrically connected to the storage and the receiver, and configured to calculate a positioning offset value according to one of the first satellite group signal and the second satellite group signal. In addition, the processor is configured to calculate a positioning result according to the second satellite group signal and the positioning offset, and store the positioning result in the storage.

Positioning device and positioning method thereof

PROBLEM TO BE SOLVED: To provide a practical strap down type orientation detection device using a gyro of relatively low precision (low price).SOLUTION: The strap down type orientation detection device includes two reception antennas which are arranged at a constant interval so as to computes positions of the reception antennas upon the basis of positioning radio waves received by the reception antennas, and further includes reference orientation angle measurement means of measuring a reference orientation angle of a moving body upon the basis of the positions of the reception antennas, and an arithmetic unit determines an initial value of a coordinate conversion matrix using the reference orientation angle obtained by the reference orientation angle measurement means.

Orientation detection device

PROBLEM TO BE SOLVED: To prevent an error of movement information from increasing even if GPS satellites are switched by comparing GPS movement information with predicted values of GPS movement information calculated one period before and performing filtering based on GPS movement information corrected with the difference thereof. SOLUTION: A GPS receiver 14 operates the position and the speed (referred to GPS movement information) of a mobile object at a positioning coordinate group based on a selected GPS satellite group. If the combination of GPS satellites changes during positioning causing variation in satellite switching information, a GPS movement information correcting section 15 calculates the difference between the GPS movement information and predicted values of GPS movement information calculated when a filter is updated one period before and stores it as a GPS movement information correction value data base 17. The GPS movement information is then corrected with the GPS movement information correction value and delivered to a movement analyzing section 16. Since the corrected GPS movement information is matched apparently with the mobility of a mobile object, subsequent filtering can be sustained stably at a filtering section 19.

Movement analyzer for mobile object

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Movement analyzer for mobile object