Abstract:
An apparatus for detecting a transmission channel in a cognitive radio system and a method thereof are provided to detect transmission channel while reducing overhead without a control signal. Correlators(601-604) perform the respective correlation the received signal about the channel of N. A frame detector(605) fits the frame synchronization from the correlation result toward the channel of N. A channel detector(606) detects the channel outputting the peak among the correlation result after the frame synchronization. An FFT(Fast Fourier Transform)(607) performs FFT the channel separator separating only the subcarrier corresponding to the channel outputting peak about the received signal. A decoder(609) decodes data of the separated corresponding subcarrier as described above.
Abstract:
A device for bidirectional transmission in a relay-type wireless communication system and a method therefore are provided to carry out bidirectional transmission by using overlapping signals at a signal level, thereby conducting the bidirectional transmission in an AF(Amplify and Forward) repeater. A repeater confirms whether signals are received from two nodes(401). If so, the repeater estimates a channel between the two nodes(403). The repeater generates overlapping signals which add signals to be transmitted to the two nodes, by using estimated channel information(405). The repeater transmits the overlapping signals to the two nodes during the same time interval(407).
Abstract:
An apparatus and a method for reducing a transmission-over-head in a broadband wireless communication system are provided to reduce the transmission-over-head by inserting allocation information of a data burst into a burst preamble in a wireless communication system based on OFDM(Orthogonal Frequency Division Multiplexing). An apparatus for reducing a transmission-over-head in a broadband wireless communication system includes a head generator(501), and a traffic channel forming unit(505). The head generator(501) generates a head including data allocation information and control information of each frame to be transmitted. The traffic channel forming unit(505) forms a traffic channel by combining the generated head with a burst. Each frame is allocated to one user for total frequency band. Transmission data is allocated on each frame according to a time resource. The data allocation information includes a user ID(Identification), a time domain start point of the burst, and a length of the burst to be allocated on the frame.
Abstract:
A channel interleaving/de-interleaving apparatus in a communication system using a low density parity check code and a control method thereof are provided to reduce error rate of an entire system by transmitting and receiving reliable LDPC(Low Density Parity Check). A channel interleaving/de-interleaving method in a communication system using a low density parity check code includes the steps of: encoding information data bit in a set encoding way to generate LDPC codeword; interleaving the LDPC codeword corresponding to a set cannel interleaving rule; and modulating the channel-interleaved LDPC codeword in a set modulation way to generate modulated symbol.
Abstract:
PURPOSE: A solar cell and a manufacturing method thereof are provided to enhance the efficiency of solar cells by forming an auxiliary layer for guiding N+ back surface filed effect in the opposite side of a light receiving surface. CONSTITUTION: A N-emitter layer(113) is formed in the front of a semiconductor layer(111) An anti-reflecting layer(120) is formed in the front of the N-emitter layer. A p+ section(151) passes through the anti-reflecting layer and the N-emitter layer. A first electrode(150) is electrically connected with the p+ section. A second electrode(160) is electrically connected with the N-emitter layer.
Abstract translation:目的:提供太阳能电池及其制造方法,以通过在受光面的相对侧形成用于引导N +背面磁场效应的辅助层来提高太阳能电池的效率。 构成:在半导体层(111)的前方形成有N-发射极层(113)。在N-发射极层的前方形成有防反射层(120)。 P +部分(151)穿过抗反射层和N-发射极层。 第一电极(150)与p +部分电连接。 第二电极(160)与N-发射极层电连接。
Abstract:
본 발명은 하이브리드 듀플렉싱(Hybrid Duplexing) 방식을 이용하는 무선 통신 시스템에서 전력 제어 방법 및 시스템에 관한 것이다. 이를 위해 본 발명은, 통신 시스템에서 전력 제어 방법에 있어서, 제1통신 방식을 사용하여 데이터를 송수신하는 영역인 제1데이터 전송 영역을 할당하고, 제2통신 방식을 사용하여 데이터를 송수신하는 영역인 제2데이터 전송 영역을 할당하는 과정과, 상기 제1데이터 전송 영역을 통해 통신 서비스를 수신기로 제공하고, 상기 통신 서비스를 제공하는 동안 상기 수신기로부터 상기 제2데이터 전송 영역을 통해 전력 제어 정보를 수신하는 과정과, 상기 수신한 전력 제어 정보에 상응하여 상기 통신 서비스 제공시 사용하는 송신 전력의 크기를 조정하고, 상기 조정한 송신 전력을 사용하여 상기 통신 서비스를 상기 제1데이터 전송 영역을 통해 상기 수신기로 제공하는 과정을 포함한다. 하이브리드 듀플렉싱, 시분할 듀플렉싱, 주파수 분할 듀플렉싱, 전력 제어, 자원 할당
Abstract:
PURPOSE: An e-fuse structure of semiconductor device is provided to reduce the occupying area of a circuit for fuse program or fuse sensing by reducing the voltage or current required for the program of e-fuse due to the enforcement overlapping of the movement effects. CONSTITUTION: A conductive film(20) is formed on a bottom layer(10). An inter-layer insulating film(50) is formed on the conductive film. A fuse unit includes a depletion area and an accumulative area. The fuse unit connects an anode and a cathode. A first insulating layer(30) is close to the depletion area of the fuse unit.
Abstract:
PURPOSE: A non-volatile memory device is provided to increase the stability of a data storage layer by forming a reaction preventive layer between the data story layer and electrodes. CONSTITUTION: At least one vertical electrode(20) is arranged to cross at least one horizontal electrode(10). At least one data storage layer(30) is interposed in the area where the vertical electrode and the horizontal electrode cross each other. The data storage layer stores changes in resistance. At least one reaction preventive layer(40) is interposed in the area where the vertical electrode and the horizontal electrode cross each other. The reaction preventive layer includes a first reaction preventive layer(40a) and a second reaction preventive layer(40b). The first reaction preventive layer is interposed between the horizontal electrode and the data storage layer. The second reaction preventive layer is interposed between the vertical electrode and the data storage layer.
Abstract:
본 발명은 저밀도 패리티 검사 부호를 사용하는 통신 시스템에서 채널 인터리링/디인터리빙 장치 및 그 제어 방법에 관한 것으로서, 이러한 본 발명은 저밀도 패리티 검사(LDPC; Low Density Parity Check) 부호를 사용하는 통신 시스템에서, 정보 데이터 비트들이 입력되면, 상기 정보 데이터 비트들을 미리 설정되어 있는 부호화 방식으로 부호화하여 LDPC 부호어로 생성하고, 상기 LDPC 부호어를 미리 설정되어 있는 채널 인터리빙 규칙에 상응하게 인터리빙한 후, 상기 채널 인터리빙된 LDPC 부호어를 미리 설정되어 있는 변조 방식으로 변조하여 변조 심벌로 생성하는 것을 특징으로 한다. LDPC, 채널 인터리버, 변수 노드, 검사 노드, 채널 디인터리버, 변조 심벌