公开(公告)号：KR1020070050339A

公开(公告)日：2007-05-15

申请号：KR1020060074309

申请日：2006-08-07

Applicant: 한국전자통신연구원

Inventor： 김일규 ,  박형근 ,  김남일 ,  장갑석 ,  김영훈 ,  방승찬

IPC: H04B7/26 ,  H04L27/26 ,  H04J11/00

CPC classification number: H04L27/2656 ,  H04J11/0069 ,  H04L5/0016 ,  H04L5/005 ,  H04L27/2613 ,  H04L27/2675

Abstract: OFDM 셀룰러 시스템에서의 셀 탐색 방법, 순방향 링크 프레임 전송 방법, 이를 이용하는 장치 및 순방향 링크 프레임 구조가 개시된다. 이 셀 탐색 장치는 각 셀로부터, 인접하는 동기 채널 심볼 간의 간격이 서로 다른 동기 채널 심볼을 복수 개 포함하는 순방향 링크 프레임에 따른 신호를 수신하고, 상기 수신신호의 동기 채널을 이용하여, 동기채널 심볼의 동기를 획득하는 동기 획득부; 및 상기 획득된 동기를 기초로, 상기 동기 채널 심볼 간의 간격 패턴을 이용하여 프레임 경계를 검출하는 경계 검출부를 포함한다. 본 발명에 따르면, 낮은 복잡도로 셀 탐색 시간을 줄일 수 있다.

Abstract translation: 的小区搜索方法，前向链路帧发送方法，使用相同的和在OFDM蜂窝系统中的前向链路帧结构的装置被公开。 小区搜索设备接收对应于包括多个同步信道码元间隔的前向链路帧中的信号是从每一个小区相邻的同步信道符号之间的不同，并在所接收的信号通过使用同步信道，同步信道码元 同步获取单元，用于获取移动终端的同步; 以及边界检测单元，用于基于所获得的同步，使用同步信道符号之间的间隔模式来检测帧边界。 根据本发明，可以以低复杂度降低小区搜索时间。

公开(公告)号：KR1020070005883A

公开(公告)日：2007-01-10

申请号：KR1020060063050

申请日：2006-07-05

Applicant: 한국전자통신연구원

Inventor： 박형근 ,  김영훈 ,  방승찬

IPC: H04B7/06 ,  H01B7/04 ,  H04B7/155 ,  H04L27/26

CPC classification number: H04B7/0417 ,  H04B7/06

Abstract: A transmitting method using a beamforming/MIMO(Multi-Input Multi-Output)/diversity combined multi-antenna transmission technique and an apparatus thereof are provided to enable a base station to transmit a data channel signal to a mobile terminal by simply combining MIMO, diversity, and beamforming and to enable the mobile terminal to easily select a multi-antenna transmission mode according to channel conditions. A base station transmission device for transmitting a downlink signal to a mobile terminal by using a multi-antenna transmission technique comprises a data channel creation part(210), a transmission mode selection part(220), a combiner(230), and a plurality of antennas(140-170). The data channel creation part(210) creates a data channel signal to be transmitted to the mobile terminal. The transmission mode selection part(220) receives a feedback signal for the downlink signal from the mobile terminal and determines a multi-antenna transmission mode to be used for the transmission of the downlink signal using the feedback signal. The combiner(230) combines the data channel signal, a common pilot signal, and a control signal, and creates the downlink signal. The antennas(140-170) output the downlink signal, transferred from the combiner(230), using a preset transmission angle.

Abstract translation: 提供了使用波束成形/ MIMO（多输入多输出）/分集组合多天线传输技术的发送方法及其装置，以使得基站能够通过简单地组合MIMO来向移动终端发送数据信道信号， 分集和波束成形，并且使得移动终端能够根据信道条件容易地选择多天线传输模式。 一种用于通过使用多天线传输技术向移动终端发送下​​行链路信号的基站传输装置，包括数据信道创建部分（210），传输模式选择部分（220），组合器（230）和多个 的天线（140-170）。 数据信道生成部（210）生成要发送到移动终端的数据信道信号。 传输模式选择部分（220）从移动终端接收用于下行链路信号的反馈信号，并且使用反馈信号确定要用于发送下行链路信号的多天线传输模式。 组合器（230）组合数据信道信号，公共导频信号和控制信号，并创建下行链路信号。 天线（140-170）使用预设的传输角度输出从组合器（230）传送的下行链路信号。

公开(公告)号：KR100608553B1

公开(公告)日：2006-08-03

申请号：KR1020030098219

申请日：2003-12-27

Applicant: 한국전자통신연구원

Inventor： 박형근 ,  방승찬 ,  김수범

IPC: H01Q21/00

CPC classification number: H01Q3/267 ,  G01S7/4008

Abstract: 본 발명은 실시간 오차 보정 기능을 가진 적응 배열 안테나 시스템에서의 송수신 장치 및 그 방법에 관한 것이다. 이 송수신 장치에서의 전달함수는 모든 송수신 채널에 오차 보정 신호를 주입하고 그 신호가 송수신 채널을 통과한 후의 신호를 분석하는 방법으로 추정된다. 이 때, 오차 보정 신호로 RF 중간 주파수 톤 신호를 사용하여 기저대역에서 신호 처리하는 과정이 단순화될 수 있다. 또한, 수신 장치에서의 오차 보정에 있어서 모든 채널 수신 장치의 이득을 하나의 신호로 제어함으로써 수신 채널별 상대적인 전달함수 특성은 수신 장치의 이득과 관계없이 일정하다. 이는 오차 보정 계수 갱신 주기를 크게 하여 오차 보정 신호가 송수신 장치에 미치는 간섭 영향이 줄어든다.
스마트 안테나, 적응 배열 안테나 시스템, 실시간 오차 보정, 중간주파수 톤, 빔 형성, 전달 함수, AGC

公开(公告)号：KR100444822B1

公开(公告)日：2004-08-18

申请号：KR1020010047552

申请日：2001-08-07

Applicant: 한국전자통신연구원

Inventor： 정재호 ,  박형근 ,  오현서 ,  경문건

IPC: H01Q3/22

CPC classification number: H01Q3/267

Abstract: The present invention utilizes a calibration signal weight vector as a response vector corresponding to a predetermined orientation angle of the antenna, thereby reducing an interference signal and enhancing a data communication effectively. The calibration method of an array antenna begins with generating a calibration signal in order to measure a transfer function of an array receiving means. A calibration signal vector is injected into the array receiver/transmitter, after multiplying a divided calibration signal and a predetermined weight vector corresponding to each channel together. The divided calibration signal is obtained by dividing the calibration signal by total number of channels. A calibration coefficient is obtained by using that the transfer function of each channel is estimated by analyzing the signal injected from the array receiver or transmitter. Finally, an interference signal is eliminated, by multiplying the received signal of a baseband and the calibration coefficient together.

Abstract translation: 本发明利用校准信号权向量作为与天线的预定方向角对应的响应向量，从而减少了干扰信号并有效地增强了数据通信。 阵列天线的校准方法从产生校准信号开始，以便测量阵列接收装置的传递函数。 在将划分的校准信号与对应于每个信道的预定权重矢量相乘之后，校准信号矢量被注入到阵列接收器/发射器中。 划分的校准信号是通过将校准信号除以总信道数获得的。 通过使用通过分析从阵列接收器或发射器注入的信号来估计每个通道的传递函数来获得校准系数。 最后，通过将基带的接收信号与校准系数相乘，消除干扰信号。

公开(公告)号：KR100428709B1

公开(公告)日：2004-04-27

申请号：KR1020010049444

申请日：2001-08-17

Applicant: 한국전자통신연구원

Inventor： 박형근 ,  오현서 ,  경문건

IPC: H04B7/04

CPC classification number: H04B7/0408 ,  G01S3/30 ,  H04B7/0617

Abstract: Disclosed are an apparatus for forward beamforming using a terminal feedback and a method thereof. The base station estimates an angle of arrival (AOA) range of a user signal from reverse link received data and calculates a plurality of beamforming weights steering the estimated AOA range. Then, the base station transmits a user pilot signal by sequentially using the plurality of beamforming weights at different time areas through a control channel to estimate a forward channel conditions. A terminal calculates the user pilot signal power for all fingers at the respective time areas and feeds a time area number corresponding to the greatest power back to the base station. The base station transmits a data channel signal using a beamforming weight corresponding to the time area number fed back from the terminal.

Abstract translation: 公开了一种使用终端反馈的前向波束形成装置及其方法。 基站估计来自反向链路接收数据的用户信号的到达角（AOA）范围，并计算指导估计的AOA范围的多个波束成形权重。 然后，基站通过控制信道在不同时间区域依次使用多个波束形成权重来发送用户导频信号，以估计前向信道条件。 终端计算各个时间区域内所有手指的用户导频信号功率，并将与最大功率对应的时间区域号码反馈给基站。 基站使用与从终端反馈的时间区域号码相对应的波束形成权重来发送数据信道信号。

公开(公告)号：KR100383669B1

公开(公告)日：2003-05-14

申请号：KR1020000059981

申请日：2000-10-12

Applicant: 한국전자통신연구원

Inventor： 박형근 ,  경문건 ,  오현서 ,  장경희

IPC: H04B7/155

CPC classification number: H04B1/7075 ,  H01Q1/246 ,  H01Q3/2605 ,  H01Q3/267 ,  H04B7/0842

Abstract: This invention relates to a method and apparatus for increasing the performance of searcher by using the array antenna when the signal to interference plus noise ratio is low. The two-dimensional searcher performs the spatial-filtering to reduce the noise and interference components and then correlates the spatial-filtered signal with a pseudo noise (PN) code to thereby detect the incoming signals and acquire the corresponding code timings. Furthermore, the two-dimensional searcher can be used to increase the performance of a finger beamformer in two ways. One is to use searcher beamforming weight as initial finger beamforming weight to increase the convergence speed in the adaptive beamforming algorithms. The other is to reduce an amount of computation in the angle of arrival estimation algorithms by calculating the azimuth power spectrum only for the specific angle range.

Abstract translation: 本发明涉及一种当信号与干扰加噪声比低时通过使用阵列天线来提高搜索器性能的方法和装置。 二维搜索器执行空间滤波以减少噪声和干扰分量，然后将空间滤波信号与伪噪声（PN）码相关，从而检测输入信号并获取相应的码定时。 此外，二维搜索器可以用于以两种方式增加手指波束形成器的性能。 一种是使用搜索器波束赋形权重作为初始手指波束形成权重来增加自适应波束形成算法中的收敛速度。 另一种是通过仅针对特定角度范围计算方位角功率谱来减少到达角估计算法中的计算量。

公开(公告)号：KR1020030015616A

公开(公告)日：2003-02-25

申请号：KR1020010049444

申请日：2001-08-17

Applicant: 한국전자통신연구원

Inventor： 박형근 ,  오현서 ,  경문건

IPC: H04B7/04

CPC classification number: H04B7/0408 ,  G01S3/30 ,  H04B7/0617

Abstract: PURPOSE: An apparatus for forming a forward beam using a multi-path information feedback and a method therefor are provided to reduce feedback data quantity and simplify a structure of a terminal by calculating an array response vector in a reverse direction in a base station, and receiving the strength of a common pilot signal and receiving only a fading characteristic of a forward channel in the terminal. CONSTITUTION: A searcher(203) matches and filters provided baseband digital data and detects a reverse multi-path. An arrival angle range measurer(204) estimates a plurality of angle regions which direct the multi-path direction detected in the searcher(203). An array receiver and demodulator(205) performs a space filtering of data received through an array antenna, and demodulates data fed back from a terminal. A forward beam forming weight value controller(207) calculates a plurality of transmission beam forming weight values which direct the angle regions estimated in the arrival angle range measurer(204), and selects one beam forming weight value for transmitting a data channel using feedback information of the terminal received from the array receiver and demodulator(205). A forward beam former and modulator(206) transmits the data channel using the beam forming weight value selected in the forward beam forming weight value controller(207), and transmits a control channel for grasping a forward channel characteristic successively using a plurality of transmission beam forming weight values.

Abstract translation: 目的：提供一种使用多路径信息反馈形成正向波束的装置及其方法，用于通过在基站中相反方向计算阵列响应向量来减少反馈数据量并简化终端的结构，以及 接收公共导频信号的强度并且仅接收终端中正向信道的衰落特性。 构成：搜索器（203）匹配和过滤提供的基带数字数据并检测反向多路径。 到达角度测量器（204）估计指导在搜索器（203）中检测到的多径方向的多个角度区域。 阵列接收机和解调器（205）对通过阵列天线接收的数据执行空间滤波，并解调从终端反馈的数据。 前向波束形成权重值控制器（207）计算引导在到达角度范围测量器（204）中估计的角度区域的多个发送波束形成权重值，并且使用反馈信息选择一个波束形成加权值来发送数据信道 从阵列接收机和解调器（205）接收的终端。 前向波束成形器和调制器（206）使用在前向波束形成权重值控制器（207）中选择的波束形成权重值来发送数据信道，并且使用多个发送波束来连续地发送用于获取前向信道特征的控制信道 形成重量值。

公开(公告)号：KR1020020029172A

公开(公告)日：2002-04-18

申请号：KR1020000059981

申请日：2000-10-12

Applicant: 한국전자통신연구원

Inventor： 박형근 ,  경문건 ,  오현서 ,  장경희

IPC: H04B7/155

CPC classification number: H04B1/7075 ,  H01Q1/246 ,  H01Q3/2605 ,  H01Q3/267 ,  H04B7/0842

Abstract: PURPOSE: A CDMA base station system using array antenna, an apparatus for acquiring initial synchronization therein, and a method thereof are provided to acquire initial synchronization and an initial finger beam formation weight vector using an array antenna having a strong directivity. CONSTITUTION: A CDMA base station system using an array antenna(102) consists of a beam formation weight memory(101), the array antenna(102), an array receiving part(103), a searcher beam former(104), a controller(105), a reference beam pattern memory(106), an antenna response procession memory(107), a beam formation weight operator(108), a finger beam former(109), and a searcher block(110). The searcher beam former(104) forms more than one antenna beam having strong directivity using the array antenna(102). The antenna response procession memory(107) stores previously measured or calculated antenna response procession. The beam formation weight operator(108) calculates beam formation weight for each directional angle using an ideal beam pattern and the antenna response procession. The beam formation weight memory(101) stores the beam formation weight calculated for each directional angle and supplies it to the finger beam former(109). The searcher block(110), composed of a correlator(111) and a PN(Pseudo Noise) code generator(112), correlates the data received through a beam-formed antenna with a PN code.

Abstract translation: 目的：提供使用阵列天线的CDMA基站系统，用于获取其初始同步的装置及其方法，以使用具有强方向性的阵列天线获取初始同步和初始手指波束形成权重向量。 构成：使用阵列天线（102）的CDMA基站系统包括波束形成权重存储器（101），阵列天线（102），阵列接收部分（103），搜索器束形成器（104），控制器 （105），参考波束图案存储器（106），天线响应处理存储器（107），波束形成权重运算器（108），手指波束形成器（109）和搜索器块（110）。 搜索器成束器（104）使用阵列天线（102）形成具有强指向性的多于一个的天线波束。 天线响应处理存储器（107）存储先前测量或计算的天线响应队列。 波束形成权重算子（108）使用理想波束图案和天线响应处理来计算每个方向角的波束形成权重。 光束形成重量存储器（101）存储针对每个方向角度计算的光束形成重量并将其提供给手指光束成形器（109）。 由相关器（111）和PN（伪噪声）码发生器（112）组成的搜索器块（110）将通过波束形成的天线接收的数据与PN码相关联。