POSITION ESTIMATING DEVICE, POSITION ESTIMATING METHOD, AND WIRELESS COMMUNICATION SYSTEM
First Claim
1. A position estimating device that estimates a position of a target wireless device, comprising:
- a storage that stores positions of a plurality of reference wireless devices;
a receiver which receives a received signal strength indicator value in signal transmission and reception between the target wireless device and each reference wireless device;
a calculator that calculates a standard deviation for a probability distribution of distances between the target wireless device and each reference wireless device, using the received signal strength indicator value;
a first estimator that calculates an estimated distance between the target wireless device and each reference wireless device, using the received signal strength indicator value; and
a second estimator that calculates the position of the target wireless device, using the standard deviation, the estimated distance, and the positions of the plurality of reference wireless devices.
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Accused Products
Abstract
According to this embodiment, a position estimating device, that estimates a position of a target wireless device, includes a storage that stores positions of a plurality of reference wireless devices, a receiver which is notified of a received signal strength indicator value in signal transmission and reception between the target wireless device and each reference wireless device, a calculator that calculates a standard deviation for a probability distribution of a distance between the target wireless device and each reference wireless device, using the received signal strength indicator value, a first estimator that calculates an estimated distance between the target wireless device and each reference wireless device, using the received signal strength indicator value, and a second estimator that calculates the position of the target wireless device, using the standard deviation, the estimated distance, and the positions of the plurality of reference wireless devices.
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Citations
17 Claims
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1. A position estimating device that estimates a position of a target wireless device, comprising:
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a storage that stores positions of a plurality of reference wireless devices; a receiver which receives a received signal strength indicator value in signal transmission and reception between the target wireless device and each reference wireless device; a calculator that calculates a standard deviation for a probability distribution of distances between the target wireless device and each reference wireless device, using the received signal strength indicator value; a first estimator that calculates an estimated distance between the target wireless device and each reference wireless device, using the received signal strength indicator value; and a second estimator that calculates the position of the target wireless device, using the standard deviation, the estimated distance, and the positions of the plurality of reference wireless devices. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A position estimating method that estimates a position of a target wireless device communicating with a plurality of reference wireless devices at known positions, comprising:
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obtaining a received signal strength indicator value in signal transmission and reception between the target wireless device and each reference wireless device; calculating a standard deviation for a probability distribution of a distance between the target wireless device and each reference wireless device using the received signal strength indicator value; calculating an estimated distance between the target wireless device and each reference wireless device using the received signal strength indicator value; and calculating the position of the target wireless device using the standard deviation, the estimated distance, and the positions of the plurality of reference wireless devices.
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10. A wireless communication system, comprising:
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a plurality of reference wireless devices; a target wireless device that communicates with the plurality of reference wireless devices; and a position estimating device that comprises; a storage that stores positions of the plurality of reference wireless devices; a receiver which receives a received signal strength indicator value in signal transmission and reception between the target wireless device and each reference wireless device; a calculator that calculates a standard deviation for a probability distribution of distances between the target wireless device and each reference wireless device using the received signal strength indicator value; a first estimator that calculates an estimated distance between the target wireless device and each reference wireless device using the received signal strength indicator value; and a second estimator that calculates the position of the target wireless device using the standard deviation, the estimated distance, and the positions of the plurality of reference wireless devices. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification