Korea Electronics Technology Institute

Hae Moon Seo

Woo Chul Park

Myung Soo Lee

Youn Sung Lee

Myung Hyun Yoon

Yang Keun Ahn

Young Choong Park

Kwang Mo Jung

Kwang Ho Won

Young Kuk Park

Kwang Soon Choi

Kyeung Hak Seo

Woo Chool Park

Myung Hyon Yoon

Jun Jae Yoo

Myung Ilyon Yoon

Disclosed herein is a 3D space touch apparatus. The 3D space touch apparatus includes a support, an infrared LED array, left and right infrared cameras, and a space touch sensor module. The support supports the infrared LED array and the left and right infrared cameras. The infrared LED array emits infrared rays, which form an infrared screen in a space above the support. The left and right infrared cameras are disposed on the left and right sides of the support so that the lenses thereof can be oriented to the infrared screen. The space touch sensor module calculates the X-, Y- and Z-axis coordinates of a location of the infrared screen, touched by user pointing means, using images captured by the left and right infrared cameras and information about the resolutions and angles of view of the left and right infrared cameras.

Three-dimensional space touch apparatus using multiple infrared cameras

Provided is an apparatus and method for eliminating an outband interference signal. An apparatus for eliminating an interference signal includes a first mixer, a filter unit, a second mixer, and an operation unit. The first mixer downconverts a received signal containing an outband interference signal. The filter unit extracts the downconverted outband interference signal from the downconverted received signal. The second mixer upconverts the downconverted outband interference signal to restore the outband interference signal to the original frequency band. The operation unit subtracts and eliminates the restored outband interference signal from the received signal.

Apparatus and method for eliminating outband interference signal

Provided are a digital IF wireless transmitter, an RF modulator, and an RF modulating method. A digital IF wireless transmitter includes an IF up-converting unit up-converting a baseband I signal and a baseband Q signal on the basis of a first IF, a first operating unit subtracting the first IF-up-converted I signal and the first IF-up-converted Q signal, a D/A converting unit analog converting an output signal of the first operating unit, an IF modulating unit separating the same first and second signals from the output signal of the D/A converting unit, and modulating the first and the second signals on the basis of a second IF, a high-pass filtering unit passing a single sideband of the modulated first signal, a miss-matching correcting unit correcting an error of the modulated second signal, a second operating unit subtracting an output signal of the high-pass filtering unit and an output signal of the miss-matching correcting unit, a feedback unit receiving a feedback signal output from the second operating unit, detecting an error of the feedback signal, and providing the detected error to the miss-matching correcting unit, and an RF up-converting unit up-converting the output signal of the second operating unit on the basis of an RF.

Digital IF wireless transmitter, RF modulator, and RF modulating method

Disclosed herein is a multi-band ZigBee transceiver for supporting IEEE 802.15.4 wireless communications. In the multi-band ZigBee transceiver, a Multi-Mode Modem (MMM) selects any one of a European version standard using 860 MHz band, a US version standard using 920 MHz band, and a worldwide version standard using 2.4 GHz ISM band among IEEE 802.15.4 standards. A frequency synthesizing unit variably adjusts a carrier frequency according to the transmission standard. A transmission unit receives a digital modulated signal, low-pass-filters the digital modulated signal with a bandwidth thereof being variably adjusted, and up-converts the filtered digital modulated signal into an RF modulated signal corresponding to the selected transmission channel. A receiving unit down-converts the RF modulated signal into a BB modulated signal using the carrier frequency, low-pass-filters the BB modulated signal with a bandwidth thereof being variably adjusted according to the selected transmission standard, converts the filtered BB modulated signal into a digital modulated signal, and outputs the digital modulated signal to the MMM. A transmission/reception switch unit outputs the RF modulated signal, input from the transmission unit, to an antenna, or outputs the RF modulated signal, received from the antenna, to the receiving unit.

Multi-band ZigBee transceiver supporting IEEE 802.15.4 wireless communication

Growing community of inventors

Gyeonggi-do, South Korea

Hae Moon Seo