NAVIGATION SATELLITE SYSTEM, ELECTRONIC DEVICE, TRANSMITTER, AND POSITIONING METHOD
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United States of America Patent
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app pub date -
Sep 22, 2017
filing date -
Mar 27, 2015
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Abstract
A navigation satellite system includes a transmitter that transmits a first radio wave having a predetermined frequency, and an electronic device that calculates position coordinates of the electronic device by using a second radio wave from a GNSS satellite, and obtains position coordinates of the transmitter. The electronic device includes a receiver that receives the first radio wave from the transmitter and the second radio wave from the GNSS satellite, and a controller that calculates a distance between the electronic device and the transmitter based on the received first radio wave, and calculates position coordinates of the electronic device based on the received second radio wave. The controller calculates, based on second radio wave received when the electronic device is present at each one of three or more points, respective position coordinates of the three or more points, and calculates respective distances between the electronic device and the transmitter when the electronic device is present at each one of the three or more points. The controller calculates the position coordinates of the transmitter based on the position coordinates of the three or more points and respective distances between each one of the three or more points and the transmitter.
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