Abstract:
PURPOSE: A constant amplitude binary orthogonal modulator/demodulator is provided to reduce the power consumption of a communication system by performing a constant amplitude binary orthogonal modulation process for transmission data. CONSTITUTION: A serial/parallel converter(200) is used for converting serial data to a data bit, a group of data bits, and a plurality of groups of data bits according to a data rate control signal. A constant amplitude encoder(210) is used for generating parity bits of each group by combining the plural groups of data bits. An orthogonal code generator(220) is used for generating different groups of orthogonal codes. A plurality of binary orthogonal modulators(230,240,250,260) are used for selecting one orthogonal code from each group and performing a binary orthogonal modulation process. A parallel adder(270) is used for adding output signals of the plural binary orthogonal modulators in parallel.
Abstract:
PURPOSE: A method for interpolating a frequency and a phase offset to improve resolution of DFT(Discrete Fourier Transform) and FFT(Fast Fourier Transform) is provided to improve the frequency of DFT algorithm and the phase resolution without increasing a DFT size by using an internally dividing point. CONSTITUTION: A sampling process is performed to sample received signals according to a predetermined period(101). The received data stream is converted to a frequency area to obtain a frequency spectrum(102). Two continuous samples having the maximum sum are selected from continuous samples of the frequency area(103). A fine frequency offset is estimated by using an internally dividing point of the selected samples(104). A total frequency offset is obtained by adding a coarse frequency offset to the estimated fine frequency offset(105).
Abstract:
PURPOSE: An envelope binary orthogonal modulation and demodulation system is provided to execute envelope binary orthogonal modulation for data so as to transmit the data at a mass data rate and a variable data rate. CONSTITUTION: An envelope binary orthogonal modulator consists of a serial/parallel converter(200), an envelope encoder(210), an orthogonal code generator(220), a plurality of binary orthogonal modulation parts(230,240,250,260), and a parallel combiner(270). The serial/parallel converter(200) converts in-phase or orthogonal phase serial data, separated from a signal splitter, into a data bit(b1), a group of data bits(b0-b2), or many groups of data bits((b0-b2),(b3-b5)(b6-b8)) according to a data rate control signal. The envelope encoder(210) combines many groups of data bits((b0-b2),(b3-b5)(b6-b8)) converted at the serial/parallel converter(200) respectively and generates a plurality of parity bits(r0,r1,r2). The orthogonal code generator(220) generates many groups of orthogonal codes((c0-c3)(c4-c7)(c8-c11)(c12-c15)). The binary orthogonal modulation parts(230,240,250,260) select their respective orthogonal codes among the orthogonal codes((c0-c3)(c4-c7)(c8-c11)(c12-c15)) according to many groups of data bits((b0-b2),(b3-b5)(b6-b8)) and the parity bits(r0,r1,r2) and adjust the codes. The parallel combiner(270) sums up the orthogonal codes, outputted from the binary orthogonal modulation parts(230,240,250,260), in parallel and generates envelope binary orthogonal modulation data.
Abstract:
An apparatus for providing a laparoscopic surgery simulation using computer graphics comprises multiple laparoscopic surgery tools; a manipulation part in which the multiple laparoscopic surgery tools are inserted; at least one camera taking a photograph of the laparoscopic surgery tools inserted into the manipulation part; and a computing device extracting the movement of each laparoscopic surgery tool based on the image of the laparoscopic surgery tool obtained from the camera and at least one camera and displaying the movement of each laparoscopic surgery tool in the human phantom computer graphics.
Abstract:
Provided are a holographic printer and a holographic printing method. The holographic printer according to an embodiment of the present invention comprises: an optical modulation unit for displaying a holographic fringe pattern for a certain portion of an object and diffracting an incident wave; and a filtering unit for shielding a component in the diffracted wave field outputted from the optical modulation unit to be transmitted to a certain area of a holographic recording medium. The holographic printer can partially record the holographic fringe pattern in the holographic recording medium in a hogel unit so that the more realistic hologram can be recorded. Furthermore, the holographic printer filters the diffracted wave field outputted from the holographic fringe pattern to record the holographic fringe pattern while removing the unconformable components, thereby eliminating a tiling phenomenon of the hologram.
Abstract:
자기 공진 방식으로 무선 전력 전송 장치로부터 전력을 수신하고 무선 충전기기로 전력을 송신하는 송수신 안테나와, 상기 무선 전력 전송 장치로부터 수신된 전력을 상기 무선 충전기기로 중계하는 중계 안테나와, 자기장 통신 프로토콜을 이용하여 상기 무선 충전기기와 자기장 통신을 수행하는 자기장 통신 모뎀과, 무선 전력의 송신, 수신, 저장, 중계를 제어하는 제어부와, 상기 무선 전력 전송 장치로부터 수신한 전력을 충전하는 배터리를 포함하는 능동형 에너지 중계기가 제공된다. 능동형 에너지 중계기는 자기장 통신을 이용하여 무선 충전기기와 통신하여 무선 충전기기의 정보를 획득할 수 있으므로, 공간 내 사용자 밀집도가 낮은 시간대에 전력을 저장해 두고 사용자 밀집도가 높은 시간대에 능동형 에너지 중계기에서 사용 기기로 에너지를 재전송함으로써 에너지 밀집도가 높은 시간에 에너지 사용을 줄이고 사용자에 대한 자기 에너지 노출 시간을 낮추어 안전성을 향상시킬 수 있다. 또한 제어를 위한 통신 기능을 갖춤으로써 무선 전력 전송 장치에서 통합적으로 제어해야 하는 무선 충전기기별 전력 제어의 부담을 덜 수 있다.
Abstract:
멀티 터치 압력에 기반한 UI 제공방법 및 이를 적용한 전자기기가 제공된다. 본 전자기기의 UI 제공방법은, 상기 전자기기에 마련된 터치 스크린을 통해 입력된 멀티 터치의 터치 압력들을 파악하고, 상기 터치 압력들을 기초로, 상기 전자기기를 제어한다. 이에 의해, 터치 스크린에서 사용자에 의해 조작된 터치의 압력을 기반으로 다양한 UI를 제공할 수 있게 되어, 사용자의 편의성과 엔터테인먼트를 향상시킬 수 있게 된다.
Abstract:
PURPOSE: A holographic reproducing apparatus and a method thereof are provided to reduce visual fatigue of a user and to supply complete three-dimensional image such as a real object. CONSTITUTION: A light separation unit(310) reflects a light coming out from a light source. A reflective spatial modulation unit(320) performs spatial light modulation reflected from the light separation unit. The reflective spatial modulation unit transfers a generated holographic to both eyes of a user. A mask removes a DC component which is generated from the reflective spatial modulation unit. The mask is arranged in a rear side of a lens which focuses a light through the light separation unit.
Abstract:
PURPOSE: A 3D image playing device and a method thereof are provided to perform Fast Fourier Transform regardless of resolution of a fringe pattern, thereby playing a hologram having the same resolution. CONSTITUTION: A recording medium stores a fringe pattern for playing a hologram. Fast Fourier Transform units(310) divide the fringe pattern into a segment having a fixed size and performs Fast Fourier Transform about the fringe pattern recorded in the divided segment. An adding unit adds the fringe pattern of segments which the Fast Fourier Transform is performed. Phase shifting units(320) shift the changed fringe pattern. [Reference numerals] (310) FFT unit; (320) Phase shifting unit
Abstract:
PURPOSE: A hologram transcoding device and a method thereof are provided to control the number of divided segments according to resolution of a fringe pattern, thereby playing an hologram with the same resolution. CONSTITUTION: A recording medium stores a fringe pattern for playing a hologram. A Fast Fourier Transform unit(30) divides the fringe pattern into a segment having a fixed size and performs Fast Fourier Transform about the fringe pattern recorded in the divided segment. An adding unit adds the fringe pattern of segments which the Fast Fourier Transform is performed. A phase shifting unit shifts the fringe pattern changed by the Fast Fourier Transform unit. [Reference numerals] (20) Pixel interval re-sampling unit; (30) Fourier transform unit; (40) Wavelength re-sampling unit