Abstract:
A wireless link system using a multiband includes: a common baseband module to operate in a first frequency band and a second frequency band higher than the first frequency band; at least one low RF module to process a signal outputted from the common baseband module in the first frequency band; at least one high RF module to process a signal outputted from the common baseband module in the second frequency band; a plurality of antennas electrically connected to the at least one low RF module and the at least one high RF module; and a control unit to adaptively allocate a control signal and data to the at least one low RF module and the at least one high RF module, based on state information of a wireless channel.
Abstract:
본 발명은 광대역 무선 통신 시스템에서 기저 대역 신호가 중간 주파수 대역(Immediate Frequency; IF) 및 무선 주파수 대역(Radio Frequency; RF) 신호로 변화할 때 대역내 이득 평탄도 및 위상 특성이 열화되는 현상을 개선 하는 방법 및 장치가 개시된다. 구체적으로 부대역 추출기를 이용하여 광대역 신호를 복수개의 부대역 신호로 분할하고 기저대역에서 각 부대역별 신호들의 이득 및 위상 지연을 선보상하고 다시 하나의 광대역 신호로 결합함으로써 IF, RF 신호를 거치면서 발생하는 대역내 이득 평탄도 및 위상 지연 평탄도 열화 현상을 개선할 수 있다.
Abstract:
The present invention relates to an apparatus and a method for mobile group object communications in a communication system. The apparatus for mobile group object communications in a communication system comprises: a wireless transmission and reception unit which is linked to at least two base stations which are located at the right and left sides of a road or rail at the same time; a base band unit which performs base band processing for signals transmitted and received by the wireless transmission and reception unit; and a network interface unit which is connected to the base band unit and forms Ethernet for providing a communication service for the devices in the mobile group object. [Reference numerals] (411) First RF unit;(412) Second RF unit;(420) Base band unit;(430) Network interface unit;(441) First Ethernet connection unit;(442) Second Ethernet connection unit;(44N) n^th Ethernet connection unit;(AA) Ethernet
Abstract:
PURPOSE: An apparatus for measuring a human body using a millimeter wave is provided to measure the human body wearing clothes by using a cloth transmission property and a human transmitting property of the millimeter wave band signal. CONSTITUTION: A plurality of millimeter wave transceivers(104) transmit millimeter waves to an object(105) and receive signals reflected or scattered from the object. A rotating unit rotates a structure with the plurality of millimeter wave transceivers. A digital signal processing unit(106) analyzes the object by using size and phase information from the received signal.
Abstract:
PURPOSE: An apparatus and method for scanning an image in an image processing system are provided to perform parallel processing by simultaneously transmitting and receiving multi-frequency signals having different bands. CONSTITUTION: An object(10) corresponds to an object for image scanning. A scanning table(20) is composed of a bracket supporting a thing for the image scanning. An image scanning device(30) includes a frequency controller(110), a frequency signal generator(120), a local oscillator(130), and a frequency up-converter(140) The image scanning device includes a frequency down converter(150), a frequency divider(160), a multi frequency processor(170), an image processing device(180), and a display device(190).
Abstract:
PURPOSE: A hairpin filter control system, a method thereof, and a hairpin filter are provided to easily eliminate a undesirable signal by forming no transmission through a simple structural transformation. CONSTITUTION: The structural transformation part(310) divides a hairpin filter into a plurality of filters. The structural transformation part arranges divided filters symmetrically. A coupling generating part(320) generates a coupled line between the symmetrically arranged filters. The coupling generating part generates the coupled line between an end or a central line of a transmission line within the filter. A frequency changing part(330) controls a parameter value related to the generated coupled line and then changes an attenuated frequency.