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|1. (WO2017150323) LOCATION ESTIMATION SYSTEM|
|Applicants:||NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY
|Title:||LOCATION ESTIMATION SYSTEM|
The present invention can estimate the location of a target object without proceeding through a step for accurately measuring the Doppler shift, etc. of wireless signals and, for the improvement of the precision of the estimations thereof, comprises: a flying body 30 that, in the process of flying an externally controllable flight trajectory, continuously receives wireless signals transmitted from a signal transmitter 20 that is attached to a target object; an observation unit 33 that observes trends in changes, relative to position, in data related to the wireless signals received by the flying body 30; and a location estimation unit 35 that finds condition-satisfying locations at which the observed relative trends in changes in the data satisfy preset conditions, that, in the process of the flying body 30 being made to fly different flight trajectories, finds at least 3 condition-satisfying locations from relative trends in changes from at least 3 observations made by the observation unit 33, and estimates the location of the target object on the basis of at least 3 plane equations into which have been respectively incorporated three-dimensional position information and a directional vector for the condition-satisfying locations.