Abstract:
PURPOSE: An ultra wideband communication modem is provided to control a direction of a directional antenna. CONSTITUTION: An RF processing unit(140) drops a frequency of the received ultra wideband signal. The RF processing unit transmits the ultra wideband signal which frequency is descended to a parallel-to-serial converter. The RF processing unit increases a frequency of a serial signal received from the parallel-to-serial converter. The RF processing unit transmits a serial signal which frequency is increased to a directional beam antenna(150). The directional beam antenna transceives a wireless signal by forming the directional beam. The directional beam antenna has a structure which can control the direction of the directional beam.
Abstract:
PURPOSE: A relay apparatus for multi-gigabit data transmission is provided to relay data transmitted to a detour path by forming a beam, thereby smoothly transceiving data with the first and second transceiving devices. CONSTITUTION: A receiving unit(120) receives a signal through beam-forming of a beam pattern of an antenna(110). A receiving module(130) generates a converting signal by amplification and down conversion of the signal. A modem module(140) generates an encoding signal of the converted signal. A transmitting module(150) generates a transmitting signal. A transmitting unit(160) transmits the transmitting signal through the beam-forming of the beam pattern of the antenna(170).
Abstract:
본 발명은 최대 출력에서 선형성을 만족시키면서, 최대 사용빈도를 갖는 영역에서 효율을 증대시켜 배터리의 사용시간을 연장할 수 있도록 한 저소비 전력 시스템에서의 전력증폭기에 관한 것이다. 본 발명의 전력증폭기는, 외부로부터 입력된 신호를 임피던스 정합시키기 위한 입력 임피던스 정합부; 상기 입력 임피던스 정합부를 경유한 신호를 증폭하기 위한 고출력 증폭부 및 저출력 증폭부; 상기 입력 신호의 전력 레벨에 따라 상기 고출력 증폭부 및 저출력 증폭부를 제어하는 증폭기 제어부; 상기 고출력 증폭부 및 저출력 증폭부로부터 증폭된 신호를 임피던스 정합시키기 위한 출력 임피던스 정합부; 및 상기 저출력 증폭부에 가변적인 동작 전압을 공급하기 위한 다이나믹 전압 공급부를 포함를 포함하되, 상기 고출력 증폭부는 선형성이 높은 특성을 가지며, 상기 저출력 증폭부는 최대 사용 빈도 영역에서 효율이 높으며 비선형 특성을 가진다. 상기 구성에 따라, 최대 출력에서 선형성을 만족시키면서, 최대 사용빈도를 갖는 영역에서 효율을 증대시켜 휴대기기 배터리의 사용시간을 연장할 수 있는 효과가 있다. 전력증폭기, 이동통신 단말기, 임피던스 정합부, 증폭기 제어부
Abstract:
본발명은증폭기의선형성을개선하기위하여증폭기단별게이트전압을다르게인가하는바이어스회로를통하여증폭기의선형성을개선하여높은출력전력에서높은품질의신호를출력해줄수 있으며, 바이어스회로가집적회로내에내장이가능하여추가적인외부전원회로가필요치않아소형증폭기모듈에효과적으로적용될수 있는, 질화갈륨집적회로를통한신호증폭기에관한것이다.
Abstract:
PURPOSE: A high-frequency receiver is provided to eliminate an out-of-band interference signal and an interference signal without an SAW(Surface Acoustic Wave) filter. CONSTITUTION: An LNA(Low Noise Amplifier)(120) amplifies signals received through an antenna. A second intermodulation elimination unit(130) eliminates second intermodulation or an out-of-band interference signal included in a signal outputted from the LNA. A passive mixer unit(140) converts the frequency of a signal outputted from the second intermodulation elimination unit. A low pass filter unit(150) eliminates an interference signal or the out-of-band interference signal included in a signal outputted from the passive mixer unit. The low pass filter unit transmits a signal in which the out-of-band interference signal or the interference signal is eliminated to a TIA(Trans-Impedance Amplifier). [Reference numerals] (130) Second intermodulation elimination unit; (140) Passive mixer unit; (150) Low pass filter unit
Abstract:
PURPOSE: A location based pairing method of a wideband wireless communication device and an apparatus thereof are provided to simply perform pairing between devices without a PIN code input in a wideband wireless communication system. CONSTITUTION: A first wireless device and a second wireless device performs synchronization operation(110). The second wireless device transmits a distance measuring signal to the first wireless device(120). The first wireless device estimates distance with the second wireless device(130). The first and second wireless devices perform pairing in case the second wireless device is inside a pairing area(140,150).
Abstract:
PURPOSE: A transmitting method using a superposition coding in a relay network is provided to restore a base data and an enhanced data by receiving the superposition coded data from a transmitter. CONSTITUTION: A transmitter(110) transmits the superposition coded data of a base data and an enhanced data during a first time period to a relay(120) and a receiver(130). The relay restores the base data and the enhanced data. According to the recovery state, the recovered enhanced data or the recovered base data is transmitted to the transmitter. The receiver receives the superposition coded data or the relay data.
Abstract:
A multi-band transceiving device is provided to transceive both transmission signal and receiving signal by separating the signals into a phase signal and a size signal, thus it is unnecessary to equip independent circuit blocks for every frequency band, thereby reducing the number of the circuit blocks. A baseband processor(100) processes a transmission signal and a receiving signal of a baseband. A transmitter(200) separates the first size signal and the first phase signal from the transmission signal, and generates a wireless transmission signal. A receiver(300) detects the second size signal from a wireless receiving signal, detects the second phase signal from the wireless receiving signal, and generates the receiving signal of the baseband. An antenna(500) receives the wireless receiving signal, as transmitting the wireless transmission signal. A transceiving/band switch(400) connects the transmitter and the receiver with the antenna according to a transceiving mode and a transceiving band.