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Electronics and Telecommunications Research Institute

The Industry & Academic Cooperation in Chungnam National University

Tae-Kyung Sung

Sung Hoon Kim

Chang Eun Lee

Young-Jo Cho

Hyun-Ja Im

Provided are a device and a method for estimating a position using a downlink access point enabling efficient indoor position measurement at a relatively low cost. The device for estimating a position using a downlink access point includes: a plurality of downlink access pointsinstalled at specific positions; and one or more user terminaldisplaying its current position, wherein the plurality of downlink access pointswirelessly transmit different address codes, and the user terminalestimates a position corresponding to the received address code to be its current position in the case in which it is within a wireless transmission range of the downlink access point

Device for estimating location and method for estimating location by using downlink access point

Provided are a device and a method for position estimation using an uplink access point, and more particularly, a device and a method for position estimation capable of estimating a position of a user terminal by allowing an uplink access point including at least two antennas to receive signals transmitted from the user terminal and using a phase difference between the received signals.

Device for estimating location and method for estimating location by using uplink access point

A system achieves seamless localization for a plurality of robots when first some robots moves to a shadow area where GPS signals are not received while remaining second robots receives the GPS signals, by performing an absolute localization for the second robots using the GPS signals; and performing an absolute localization for the second robots using the GPS signals; performing a relative localization for the first robots based on the second robots, thereby determining an absolute location of the first robots. Further, when the second robots move to the shadow area where the first robots have been moved, the system performs the seamless localization by determining a relative location of the second robots based on the first robots on which the relative localization has been performed, thereby determining an absolute location of the second robots based on the relative location of the second robots.

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Daejeon, South Korea

Tae-Kyung Sung