公开(公告)号：KR1020070108316A

公开(公告)日：2007-11-09

申请号：KR1020060084867

申请日：2006-09-04

Applicant: 한국전자통신연구원

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

IPC: H04L27/26 ,  H04L1/02 ,  H04B7/02

CPC classification number: H04B7/0689 ,  H04B7/0408 ,  H04B7/0604 ,  H04B7/068 ,  H04B7/0695 ,  H04L1/0625 ,  H04L25/022 ,  H04L25/0228 ,  H04L27/2647 ,  Y02D70/142 ,  Y02D70/444

Abstract: A transmission diversity method for an SCH(Synchronization Channel) and a BCH(Broad casting Channel) in an OFDM(Orthogonal Frequency Division Multiplexing) cellular system is provided to detect OFDM symbol and frame timings during an initial power-on step, to estimate initial frequency offset, and to use the synchronization channel for coherent demodulation in demodulating the BCH by a mobile station. In an OFDM based cellular system defining an SCH and a BCH at a forward link, a transmission diversity method for the SCH and the BCH includes a step for arranging SCH and BCH symbols(192,193) adjacently to each other if two or more transmission antennas of a base station exist and a step for applying the same transmit diversity to the adjacent SCH and BCH symbols and then transmitting the SCH and BCH symbols through the same antenna.

Abstract translation: 提供了OFDM（正交频分复用）蜂窝系统中的SCH（同步信道）和BCH（Broadcast Channel）的传输分集方法，用于在初始加电步骤期间检测OFDM符号和帧定时，以估计初始 并且在移动台解调BCH时使用同步信道进行相干解调。 在前向链路上定义SCH和BCH的基于OFDM的蜂窝系统中，用于SCH和BCH的发送分集方法包括如下两个或更多个发送天线之间相互排列SCH和BCH符号（192,193）的步骤： 存在基站以及将相同的发送分集应用于相邻的SCH和BCH符号，然后通过同一个天线发送SCH和BCH符号的步骤。

公开(公告)号：KR1020070083180A

公开(公告)日：2007-08-23

申请号：KR1020070012571

申请日：2007-02-07

Applicant: 한국전자통신연구원

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

IPC: H04L27/26 ,  H04B7/26

CPC classification number: H04L27/2617 ,  H04L1/0071 ,  H04L27/2618

Abstract: An apparatus and a method for transmitting data through a resource block are provided to prevent the increase of demodulation errors and decoding errors due to the punching by changing a coding rate and a demodulation rate according to the degree of punching. A method for transmitting data through a resource block includes the steps of: channel-encoding data for a predetermined resource block and generating the encoded data(S130); interleaving the encoded data and generating the interleaved data(S140); digital-modulating the interleaved data and generating the digital-modulated data(S150); punching the digital-modulated data as much as data of a synchronization channel or a broadcast channel for the predetermined resource block and generating the punched data(S160); multiplexing the data of the synchronization channel or the broadcast channel for the predetermined resource block and the punched data for each resource block and generating a multiplexed signal(S170); and transmitting the multiplexed signal(S190).

Abstract translation: 提供了一种通过资源块发送数据的装置和方法，以通过根据冲压程度改变编码率和解调速率来防止解调错误增加和解码错误。 一种通过资源块发送数据的方法包括以下步骤：对预定资源块进行信道编码，生成编码数据（S130）。 交错编码数据并产生交错数据（S140）; 数字调制交错数据并产生数字调制数据（S150）; 将数字调制数据与预定资源块的同步信道或广播信道的数据相冲突，并产生冲孔数据（S160）; 复用用于预定资源块的同步信道或广播信道的数据和每个资源块的穿孔数据并产生多路复用信号（S170）; 并发送多路复用信号（S190）。

公开(公告)号：KR1020070076372A

公开(公告)日：2007-07-24

申请号：KR1020060082160

申请日：2006-08-29

Applicant: 한국전자통신연구원

Inventor： 장갑석 ,  박형근 ,  김영훈 ,  방승찬

IPC: H04J11/00 ,  H04L27/26 ,  H04B7/005 ,  H04B7/26

CPC classification number: H04B7/2621 ,  H04B7/005 ,  H04L27/26 ,  H04W84/02

Abstract: An apparatus for generating a downlink signal, and a method and an apparatus for restoring data in a cellular system are provided to improve calculating efficiency of a log likelihood ratio for soft decision by getting interference elements and noise elements through orthogonal sequence information included in a pilot signal of the downlink signal. A method for restoring data in a cellular system includes the steps of: Fourier-transforming and equalizing a received signal(S110); detecting a channel coefficient, signal power, and noise power of a plurality of cells from a pilot sub-carrier signal included in a sub frame of the received signal(S120); detecting interference power by using a traffic sub-carrier signal included in the received signal(S130); calculating the dispersion of the received signal by using the detected signal power, interference power, and noise power(S140); and determining a log likelihood ratio and performing soft decision by using the equalized reception signal and the calculated dispersion(S150,S160).

Abstract translation: 提供一种用于生成下行链路信号的装置，以及用于在蜂窝系统中恢复数据的方法和装置，用于通过通过包括在导频中的正交序列信息获得干扰元素和噪声元素来提高用于软判决的对数似然比的计算效率 下行链路信号的信号。 一种用于在蜂窝系统中恢复数据的方法包括以下步骤：对接收信号进行傅里叶变换和均衡（S110）; 从包括在接收信号的子帧中的导频子载波信号中检测多个小区的信道系数，信号功率和噪声功率（S120）; 通过使用包含在接收信号中的业务副载波信号来检测干扰功率（S130）; 通过使用检测的信号功率，干扰功率和噪声功率计算接收信号的色散（S140）; 并且通过使用均衡的接收信号和所计算的色散来确定对数似然比并执行软判决（S150，S160）。

公开(公告)号：KR100666403B1

公开(公告)日：2007-01-09

申请号：KR1020060033072

申请日：2006-04-12

Applicant: 한국전자통신연구원

Inventor： 박형근 ,  김일규 ,  이문식 ,  김영훈 ,  방승찬

IPC: H04B7/06 ,  H04L27/26

CPC classification number: H04B7/0617 ,  H04L27/26

Abstract: A transmission apparatus and a transmission method for a base station in a cellular system are provided to increase the throughput by dividing a frequency band into a plurality of groups, allocating a beamforming weight to each of the groups, and increasing the selectivity for group selection. A transmission apparatus for a base station in a cellular system comprises a user signal generator(100), a multi-antenna modulator(200), and a plurality of subcarrier allocators(300). The user signal generator(100) divides an allocated frequency band into a plurality of groups, and creates each group's user signal for each associated sub carrier. The multi-antenna modulator(200) applies a beamforming weight to each of the cell boundary user signals. The cell boundary multi-antenna modulator(200) applies a beamforming weight corresponding to each of the groups to each of the user signals. Each of the subcarrier allocators(300) allocates a corresponding subcarrier to each of the beamforming weight-applied user signals.

Abstract translation: 提供了一种用于蜂窝系统中的基站的传输装置和传输方法，以通过将频带划分成多个组来增加吞吐量，为每个组分配波束成形权重，并增加群组选择的选择性。 蜂窝系统中的基站的发送装置包括用户信号发生器（100），多天线调制器（200）和多个子载波分配器（300）。 用户信号发生器（100）将分配的频带划分成多个组，并且为每个相关联的子载波创建每个组的用户信号。 多天线调制器（200）对每个小区边界用户信号应用波束成形权重。 单元边界多天线调制器（200）将对应于每个组的波束形成权重应用于每个用户信号。 每个子载波分配器（300）将相应的子载波分配给每个波束赋形加权的用户信号。

公开(公告)号：KR100516894B1

公开(公告)日：2005-09-23

申请号：KR1020020072338

申请日：2002-11-20

Applicant: 한국전자통신연구원

Inventor： 박형근 ,  김일규 ,  좌혜경 ,  이준환 ,  방승찬

IPC: H04B7/216

Abstract: 본 발명은 배열 안테나 기지국 수신 시스템 및 그 방법에 관한 것으로서, 본 발명은 각 안테나에서 수신한 디지털 수신신호에서 획득한 칩 레벨 데이터를 이용하여 모든 핑거의 빔형성에 대해 공통 적용이 가능한 상관역행렬을 연산하는 1개의 상관역행렬 추정부, 칩 레벨 데이터와 기준 신호를 상관하여 상관 벡터를 연산하는 상관벡터 추정수단, 상관역행렬과 상관벡터를 곱하여 빔형성 가중치를 연산하는 곱셈부, 및 칩 레벨 데이터에 상기 빔형성 가중치를 곱한 후 이를 모두 합하여 공간 필터링을 수행하는 빔형성 기능과 상기 칩 레벨 데이터와 확산코드를 상관하는 역확산 기능을 수행하는 적응 수신수단을 포함한다. 따라서, 본 발명은 칩 레벨에서 추정한 빔형성 가중치 연산시 상관역행렬을 다수의 핑거가 공유함으로써 빔형성 가중치를 연산하기 위한 하드웨어를 간소화할 수 있고, 칩 레벨 데이터를 이용한 빔형성 가중치를 심벌 레벨의 제어채널 신호와 데이터채널 신호에 적용하여 빔형성 함으로써 하드웨어를 간소화뿐만 아니라, 데이터 채널을 빔형성 가중치 갱신 주기동안 저장한 후 빔형성하므로 데이터채널에 대한 복조 성능을 향상시키는 효과를 제공하여 준다.

公开(公告)号：KR100465314B1

公开(公告)日：2005-01-13

申请号：KR1020020039739

申请日：2002-07-09

Applicant: 한국전자통신연구원

Inventor： 박형근 ,  김일규 ,  방승찬

IPC: H04B7/04

Abstract: PURPOSE: A system for forming a beam through mobile communication and a method therefor are provided to obtain azimuth power distributions with two array antennas while estimating reverse signal directions, and to estimate all multiple paths, thereby increasing accuracy and simultaneously obtaining beam forming gains and diversity gains. CONSTITUTION: A base station receiving device averages receiving power values by angle, and estimates signal directions. A base station transmission device orients each array antenna(101,102) toward the estimated signal directions, converts digital data into analog data, and transmits the analog data. The base station receiving device comprises as follows. An antenna unit(110) consists of the two antennas(101,102). A multiple channel down converter(120) down-converts reverse signals to each baseband digital signal. A correlation vector estimator(130) estimates correlation vectors. A direction estimator(140) obtains receiving power distributions by angle, obtains azimuth power distributions, and estimates multiple path directions. A transmission beam forming weight operator(150) operates transmission beam forming weight.

Abstract translation: 目的：提供一种通过移动通信形成波束的系统及其方法，用于在估计反向信号方向的同时获得具有两个阵列天线的方位功率分布，并估计所有多个路径，从而提高准确性并同时获得波束形成增益和分集 收益。 组成：基站接收设备按角度平均接收功率值，并估计信号方向。 基站传输设备将每个阵列天线（101,102）朝向估计的信号方向定向，将数字数据转换成模拟数据，并发送模拟数据。 基站接收设备包括如下。 天线单元（110）由两个天线（101,102）组成。 多信道下变频器（120）将反向信号下变频为每个基带数字信号。 相关矢量估计器（130）估计相关矢量。 方向估计器（140）通过角度获得接收功率分布，获得方位角功率分布，并且估计多个路径方向。 传输波束成形重量操作器（150）操作传输波束成形重量。

公开(公告)号：KR1020040043894A

公开(公告)日：2004-05-27

申请号：KR1020020072338

申请日：2002-11-20

Applicant: 한국전자통신연구원

Inventor： 박형근 ,  김일규 ,  좌혜경 ,  이준환 ,  방승찬

IPC: H04B7/216

Abstract: PURPOSE: An array antenna base station reception system and a method thereof are provided to estimate beamforming weight at a chip level instead of a symbol level, and to share a correlation reverse matrix between fingers, thereby simplifying a hardware structure necessary for estimating the beamforming weight. CONSTITUTION: A multi-channel down-converter(100) converts wireless frequency signals received to each antenna(111) into digital reception signals, and outputs the digital reception signals. A correlated reverse matrix estimator(200) operates a correlated reverse matrix applicable to a beamforming process of all fingers by using chip level data obtained from the digital reception signals. A finger portion(300) shares the correlated reverse matrix as correlating the digital reception signals with a reference signal, estimates correlation vectors by finger, and performs beamforming/despreading processes by consisting of the fingers. A multiplying portion(400) multiplies the correlated reverse matrix by the correlation vectors, operates beamforming weight, and transmits the beamforming weight to the finger portion(300).

Abstract translation: 目的：提供阵列天线基站接收系统及其方法来估计码片级的波束成形权重而不是符号级别，并且共享指状物之间的相关逆矩阵，从而简化估计波束形成权重所需的硬件结构 。 构成：多通道下变换器（100）将接收到每个天线（111）的无线频率信号转换为数字接收信号，并输出数字接收信号。 相关的反向矩阵估计器（200）通过使用从数字接收信号获得的码片级数据来操作适用于所有手指的波束成形处理的相关反向矩阵。 手指部分（300）共享相关联的反向矩阵，使数字接收信号与参考信号相关，通过手指估计相关矢量，并通过手指组成进行波束形成/解扩处理。 乘法部分（400）将相关逆矩阵乘以相关矢量，操作波束成形权重，并将波束成形权重发送到手指部分（300）。

公开(公告)号：KR1020040031520A

公开(公告)日：2004-04-13

申请号：KR1020020060988

申请日：2002-10-07

Applicant: 한국전자통신연구원

Inventor： 김일규 ,  박형근 ,  이준환 ,  좌혜경 ,  이홍섭 ,  방승찬

IPC: H04B7/08 ,  H04B1/69

CPC classification number: H04B7/0848

Abstract: PURPOSE: An array antenna system in a wireless communication system is provided to maintain the same power levels of reception signals during a beam forming process of the reception signals, and to use power ratio information of the reception signals when forming transmission beams, thereby magnifying transmission and reception performance. CONSTITUTION: A signal converter(300) amplifies an RF signal through array antennas(310_1-310_n), down-converts an RF to an IF to convert the IF into a digital signal, and outputs the digital signal to a baseband unit(400). The signal converter(300) receives an IF signal from the baseband unit(400), converts the IF signal into an analog signal, up-converts the analog signal to an RF signal, and wirelessly transmits the RF signal. The baseband unit(400) generates beam forming signals having the same power levels by using the signal outputted from the signal converter(300), performs a combining/decoding process, and outputs a final signal to a digital demodulator. The baseband unit(400) modulates a channel-coded signal for an input signal of the digital demodulator, based on power ratios of the beam forming signals, generates transmission beam forming signals, and outputs the transmission beam forming signals to the signal converter(300).

Abstract translation: 目的：提供一种无线通信系统中的阵列天线系统，用于在接收信号的波束形成处理期间维持接收信号的相同功率电平，并且在形成发射波束时使用接收信号的功率比信息，从而放大传输 和接待表演。 构成：信号转换器（300）通过阵列天线（310_1-310_n）放大RF信号，将RF下变频为IF以将IF转换为数字信号，并将数字信号输出到基带单元（400） 。 信号转换器（300）从基带单元（400）接收IF信号，将IF信号转换为模拟信号，将模拟信号上变频为RF信号，并将RF信号无线发送。 基带单元（400）通过使用从信号转换器（300）输出的信号产生具有相同功率电平的波束形成信号，执行组合/解码处理，并将最终信号输出到数字解调器。 基带单元（400）基于波束形成信号的功率比来调制用于数字解调器的输入信号的信道编码信号，产生传输波束形成信号，并将传输波束形成信号输出到信号转换器（300 ）。

公开(公告)号：KR1020030034259A

公开(公告)日：2003-05-09

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: PURPOSE: An error calibration apparatus is provided to enable data communication efficiently by adding a function of reducing an interference where an error calibration signal affects a signal received or transmitted from and to an array antenna. CONSTITUTION: An array antenna(101) includes a plurality of emission elements and is connected to an error calibration signal inserting part(102) and an array receiver(103). The array receiver(103) down-converts an RF-band signal which is received by the array antenna and transferred via the error calibration signal inserting part(102), and converts the down-converted signal into a digital signal. An error calibration signal generator(104) up-converts an error calibration signal generated in a base band into an RF band and generates an error calibration signal. The error calibration signal inserting part(102) divides an RF error calibration signal by a total channel number and multiplies a predetermined weight with each channel. An error calibration coefficient estimation part(105) correlates an error calibration signal passing the array receiver to the error calibration signal generated from the generator(104) and estimates a transfer function of the receiver(103) of each channel. An error calibration part(106) multiplies an error calibration coefficient to a digital signal from the array receiver and removes different transfer function components every channel. An array beam forming part(107) points to a visit direction of different signals.

Abstract translation: 目的：提供一种错误校准装置，通过增加减少误差校准信号影响从阵列天线接收或发射的信号的干扰的功能，有效地进行数据通信。 构成：阵列天线（101）包括多个发射元件，并连接到误差校准信号插入部分（102）和阵列接收器（103）。 阵列接收器（103）对由阵列天线接收并经由误差校准信号插入部分（102）传送的RF频带信号进行下变频，并将下变频信号转换为数字信号。 误差校准信号发生器（104）将在基带中产生的误差校准信号上变频成RF频带并产生误差校准信号。 误差校准信号插入部分（102）将RF误差校准信号除以总信道数，并将预定权重与每个信道相乘。 误差校准系数估计部分（105）使通过阵列接收器的误差校准信号与从发生器（104）产生的误差校准信号相关联，并估计每个通道的接收器（103）的传递函数。 误差校准部件（106）将误差校准系数与阵列接收器的数字信号相乘，并且每个通道去除不同的传递函数分量。 阵列波束形成部（107）指向不同信号的访问方向。

公开(公告)号：KR100366293B1

公开(公告)日：2002-12-31

申请号：KR1020000004115

申请日：2000-01-28

Applicant: 한국전자통신연구원

Inventor： 박형근 ,  경문건 ,  강양기

IPC: H04B7/005

Abstract: 본 발명은 적응형 배열 안테나를 이용하는 이동통신 기지국시스템, 위성 통신시스템, 그리고 위상 배열 레이다와 같이 송수신용 다중 RF 채널을 이용하는 시스템에서 각 채널의 I/Q 오차와 채널 간 전달함수 변화를 측정하고 보정하는 방법과 장치에 관한 것이다. 사용자가 원하는 안테나 빔 패턴을 형성하기 위하여, 다중 채널시스템에서 각 채널의 전달함수를 동일하게 해주어야 한다. 본 발명에서는 온도와 시간에 따라 변하는 다중 채널의 오차를, 각 송수신 채널에 기준신호를 주입시켜 채널을 거친 데이터를 측정, 분석함으로써, 기저대역에서 디지털로 보정하는 방법을 제시한다.
이러한 본 발명의 오차 보정장치는, 기준신호 발생수단과; 각 채널에서의 I/Q 오차와 전달함수 오차를 보정하기 위하여 I/Q 오차보정계수와 전달함수 추정값을 구하는 오차보정계수 추정수단; 상기 I/Q 오차보정계수를 이용하여 각 수신채널에 대한 I/Q 오차를 보정하는 I/Q 오차 보정수단; 및 전달함수 오차를 보정하는 전달함수 오차 보정수단을 포함한다.