Electronics and Telecommunications Research Institute

Soongsil University

Korea Electrotechnology Research Institute

Hyung Min Chang

Won Cheol Lee

Woo Yong Lee

Young Jin Park

Seung Eun Hong

Kapseok Chang

Kwan Ho Kim

Mun Geon Kyeong

Yo An Shin

E Rang Lim

Soon Woo Lee

Ji Myung Kang

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

Provided is a sequential transmission multi-beamforming apparatus and method with a low complexity based on a Hadamard matrix. A simple codebook may be generated based on the Hadamard matrix and thus, a number of weighted-vectors is reduced and a complexity of hardware is decreased. A diversity gain may be maximized based on a spatial diversity processing apparatus and a beamforming weighted vector may be systematically generated.

Sequential transmission multi-beamforming method with low complexity using Hadamard matrix

Growing community of inventors

Seoul, South Korea

Hyung Min Chang