Korea Electrotechnology Research Institute

Soongsil University

Ji Myung Kang

Young Jin Park

Kwan Ho Kim

Soon Woo Lee

Jin Wook Kim

Yo An Shin

E Rang Lim

Won Cheol Lee

Hyung Min Chang

Soon Wo Lee

A magnetic resonance wireless power transfer method according to an aspect of the present invention includes transmitting power from a source coil to the Tx resonant coil using a magnetic induction method, transmitting the power from the Tx resonant coil to an Rx resonant coil, having a resonant frequency identical with that of the Tx resonant coil, via magnetically-coupled resonance, and transmitting the power from the Rx resonant coil to the device coil of an electronic device using the magnetic induction method. The Tx resonant coil and the Rx resonant coil are arranged at a right angle or a specific angle of inclination relative to each other.

Space-adaptive wireless power transfer system and method using evanescent field resonance

A wireless positioning server using clock offset compensation and a wireless positioning method using the same. The wireless positioning server using clock offset compensation estimates a precise position of a tag requiring position information by effectively predicting information regarding a distance between a beacon for performing positioning and the tag requiring position information. An error in the positioning estimation result due to a clock offset is minimized by measuring a relative clock frequency ratio between beacons and by compensating for clock frequencies of the beacons when a distance between a beacon and a tag is estimated.

Wireless positioning server using clock offset calibration positioning method using the same

Disclosed herein is a wireless location determination system and method. A wireless location determination system of the present invention includes one or more location determination nodes (reception units) for calculating standard deviations of time intervals between pulses sequentially received from a location determination target, and estimating reliability values from the standard deviations. A location determination server receives messages, including the reliability values, from the location determination nodes, and obtains a location of the location determination target (transmission unit). Accordingly, the present invention can not only improve the resolution of location determination by correcting the distances between the location determination target and the respective location determination nodes, but also can easily observe the location determination performance of a relevant node by monitoring reliability values of the location determination nodes, and can regard the reliability values as measures for the observation of performance and the maintenance of location determination nodes.

Wireless location determination system and method

Disclosed herein is an apparatus and method for detecting an impulse signal or impulse sequence to realize wireless real-time location system application in a multipath fading environment. The apparatus includes a band-pass filter, an RF analog unit, and a signal processing base-band unit. The band-pass filter removes unnecessary frequency bands from impulse signals received through a receiving antenna. The RF analog unit detects the envelope of the impulse sequence deprived of the unnecessary frequency bands and based on a multipath, and outputs a digital signal regarding the envelope based on a leading edge of the envelope. The signal processing base-band unit performs low-speed 1-bit sampling and then output data, and, if frame synchronization has been found or a ranging command has been detected, performs high-speed 1-bit sampling and then calculates and outputs the propagation time of the impulse signals.

Apparatus and method for detecting impulse signal and impulse sequence

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Ansan-si, South Korea

Ji Myung Kang