Abstract:
본 발명의 실시예에 따르면, 제1 기지국이 적어도 하나의 이웃 기지국과 협력하여 데이터를 전송하는 방법이 제공된다. 상기 제1 기지국은, 단말로부터 상기 이웃 기지국의 채널 상태를 수신한다. 상기 제1 기지국은, 상기 채널 상태의 값을 코디네이터로부터 수신된 제1 임계값 및 제2 임계값과 비교한다. 상기 제1 기지국은, 상기 채널 상태의 값이 상기 제1 임계값 보다 높거나, 상기 제2 임계값 보다 낮은 경우에, 상기 이웃 기지국에 대한 정보를 상기 코디네이터에게 전송한다. 그리고 상기 제1 기지국은, 상기 코디네이터로부터 수신된, 협력 전송을 위한 정보에 기초해, 데이터를 단말에게 전송한다.
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 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:
PURPOSE: An apparatus and a method for measuring multiple link wireless channels are provided to minimize times and costs required for measuring the wireless channels. CONSTITUTION: A transmitting signal processing part(430) transmits signal measuring signals, which are transmittable through radio channels, through multi-antennas. A signal processing part(440) receives and processes multiple link radio channel signals which are transmitted through the multi-antennas. A controlling part(450) receives an operation mode selecting signal containing transmitting or receiving modes and selectively operates a transmitted or received signal processing part.
Abstract:
An automatic clustering method, a multipath clustering method using the same and an apparatus thereof in a mobile communication environment are provided to set an initial cluster center value by using hierarchical clustering algorithm, thereby preventing performance from being lowered except the initial cluster center value. An initial cluster center is obtained through hierarchical clustering algorithm(S310). The initial cluster center is reset by a planar clustering algorithm. Clustering of data groups is performed according to the reset cluster center. An optimum cluster number is determined by calculating verification indexes about the clustered data groups. The hierarchical clustering algorithm defines a distance between clusters by an average distance between samples.