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AssigneeSeiko Epson Corporation
InventorTakuya Sugimoto
Estimating the term…
The vector coordinates of each acquired satellite are calculated, the vector coordinates being given by the coordinates of an end point of a vector of which the direction coincides with the direction (azimuth) of the corresponding acquired satellite based on the present position and the magnitude corresponds to a signal strength. An overall BOP that indicates the deflection of the acquired satellite signals is calculated by adding up the vector coordinates of each acquired satellite signal. The position of the overall BOP indicates the direction of deflection (deflection azimuth) of the acquired satellite signals, and the distance from an origin O indicates the degree of deflection (deflection strength) of the acquired satellite signals.
An index value calculation method comprising calculating an index based on given azimuths of satellites that have transmitted received satellite signals for positioning and given signal strengths of the received satellite signals, the index indicating reliability of the received satellite signals.
A calculation circuit comprising an index calculation section that calculates an index based on given azimuths of satellites that have transmitted received satellite signal for positioning and given signal strengths of the received satellite signals, the index indicating reliability of the received satellite signals.
A positioning device comprising an index calculation section that calculates an index based on given azimuths of satellites that have transmitted received satellite signals for positioning and given signal strengths of the received satellite signals, the index indicating reliability of the received satellite signals, the positioning device performing positioning calculations while selecting satellite signals used for positioning from the received satellite signals based on the index calculated by the index calculation section.
Dependencies are inferred from the claim text.