Abstract:
다중 입출력 시스템, 수신장치 및 신호 수신방법이 개시된다. 본 발명의 일 실시예에 따른 다중 입출력 시스템은, 위상 및 안테나를 다르게 하여 이중 시공간 송신 다이버시티 코딩된 신호들을 송신하는 송신장치 및 송신장치로부터 신호를 수신하면 최대우도 추정방식을 이용하여 일부 심볼을 추정하고, 결정 피드백 등화 방식을 이용하여 추정된 일부 심볼을 제외한 나머지 심볼을 추정하며, 일부 심볼 및 나머지 심볼에 대한 로그 우도율(LLR)을 계산하되 수신신호의 채널 행렬 벡터(H)를 변경하여 나머지 심볼에 대한 로그 우도율을 계산하는 수신장치를 포함한다.
Abstract:
PURPOSE: A high frequency transception apparatus is provided to configure a high frequency transception coupling front-end which supports time division duplex/frequency division duplex (TDD/FDD) and to support various functions which is required with the development of a wireless communication technology through single transception coupling front-end. CONSTITUTION: A transmission unit hybrid coupler (304) outputs a transception signal which is divided into a first output and a second output having 90 degrees phase difference. A first circulator (303) inputs the first output of the transmission unit hybrid coupler to a first terminal. The first circulator outputs the inputted first output to a second terminal. A second circulator (306) inputs the second output of the transmission unit hybrid coupler to the first terminal.
Abstract:
PURPOSE: A communication method using a multi-radio interface is provided to increase data transmission performance by interoperating a plurality of wireless interfaces. CONSTITUTION: A wireless terminal configures TCP connection with a reception device through a second wireless communication network(310). The wireless terminal transmits the TCP data to the reception device through a first wireless communication network(320). The wireless terminal receives an ACK with respect to the transmitted TCP data from the reception device through the second wireless communication network(330). Since the ACK with respect to the TCP data is received along the path of the initial TCP connection configuration, the wireless terminal receives the ACK with respect to the TCP data through the second wireless communication network. [Reference numerals] (310) TCP connection; (320) TCP data transmission; (330) TCP data for ACK receiving; (AA) Start; (BB) Finish
Abstract:
PURPOSE: A multi-antenna wireless channel measurement device using multiple codes and an operation method thereof are provided to measure a wireless channel by transmitting codes for measuring various lengths based on the speed change of a mobile unit. CONSTITUTION: A timing unit(110) generates a code clock synchronized with other wireless channel measurement device and a synchronization signal. The timing unit determines code and measurement time for measurement according to the speed of an installed mobile unit in which a wireless channel measurement device is installed. A baseband unit(120) successively transmits codes for the measurement according to the synchronization signal. The baseband unit stores wireless channel measurement data by receiving the wireless channel measurement data in the measurement time. An RF(Radio Frequency) module(130) transmits the code for the measurement through a multi-antenna. The RF module receives the wireless channel measurement data. [Reference numerals] (110) Timing unit; (120) Baseband; (130) RF module; (200) Control device
Abstract:
신호의 재전송시에 기지국과 단말을 중계하는 협력 중계기가 개시된다. 또한 협력 중계기와 상호 협력하여 단말로부터 신호를 수신하는 기지국이 개시된다. 협력 중계기는 단말이 기지국 또는 서비스 중계기에 송신한 신호를 수신하고 복호하여 복호된 신호에 오류가 없는 경우 수신한 신호를 저장한다. 기지국은 단말이 송신한 신호를 복호할 때 오류가 발생하면 오류가 발생한 신호에 대한 재전송을 협력 중계기에 요청한다. 협력 중계기는 재전송을 요청 받으면 기지국이 요청한 신호를 기지국에 전송한다. 이로써, 기지국의 신호 재전송 요청시에 오류율을 낮출 수 있으므로, 자원 재사용 효율이 좋아지고, 간섭량은 낮아지며, 시간 지연에 민감한 서비스에의 적용이 용이하다. 기지국, 중계기, 셀룰러
Abstract:
PURPOSE: A digital pre-distortion device and a method thereof are provided to simultaneously achieve high-linearity and high-efficiency. CONSTITUTION: A DPD(Digital Pre-Distortion) algorithm execution unit(120) calculates the maximum output value and average output value of an output signal for an input signal of a power amplifier during a predetermined period. The DPD algorithm execution unit obtains the reversed function of the output function based on a reference value between an average input value and a maximum input value. A pre-compensation device(110) distorts a source input signal by using information corresponding to the reversed function of the output signal. The pre-compensation device inputs the pre-distortion signal as an input signal of the power amplifier. [Reference numerals] (110) Pre-compensation device; (112) Look-up table; (120) DPD algorithm execution unit
Abstract:
PURPOSE: An M2M(Machine to Machine) communication gateway terminal device and an M2M data relay method using the same are provided to offer an M2M service between the M2M device and an MTC(Machine Type communication) server. CONSTITUTION: A second wireless matching unit(530) processes a signal including second frequency band characteristics. The second wireless matching unit provides wireless access matching with one or more M2M devices. A wireless access conversion processing unit(520) converts data outputted to the first wireless matching unit and the second wireless matching unit. A control unit(570) grasps an identifier of one or more M2M devices related to M2M control information received from the first wireless matching unit. The control unit controls the second wireless matching unit in order to transmit the M2M communication control information to the corresponding M2M device. [Reference numerals] (510) First wireless matching unit; (520) Wireless access conversion processing unit; (530) Second wireless matching unit; (540) Storage unit; (550) Display unit; (560) Input and output unit; (570) Control unit;