公开(公告)号：KR1020030028111A

公开(公告)日：2003-04-08

申请号：KR1020010060078

申请日：2001-09-27

Applicant: 한국전자통신연구원

Inventor： 박재준 ,  오현서 ,  경문건 ,  이준환

IPC: H04B7/216

CPC classification number: H04W16/28 ,  H04B7/216 ,  H04W52/42 ,  H04W74/02

Abstract: PURPOSE: A space-time array receiving system in a CDMA(Code Division Multiple Access) and a method thereof are provided to easily cancel signals of several users located at the same region in a CDMA system under a multi path channel environment, thereby enhancing amount of a reverse direction channel. CONSTITUTION: A signal processing unit(20) consists of a multi-channel array receiver(21) which changes a plurality of signals received from an array antenna(10) into a base band digital signal. An arrival angle and beam coefficient estimator(23) estimates an arrival angle and beam formation coefficient of the received signal on the basis of a signal outputted from the multi-channel array receiver(21). A digital beam formation device(22) forms an optimum directional beam by multiplying a signal outputted from the multi-channel array receiver(21) by an estimated beam formation coefficient. A rake receiver(24) combines a signal outputted from the digital beam formation device(22) with the maximum ratio in order to maximize a signal power to noise of a user's signal to noise power. An adaptation plural user detector(25) cancels an identical channel interference signal to a signal outputted from the rake receiver(24). A controller(26) discriminates whether a user are positioned at the same position on the basis of an arrival angle of an estimated user, then controls the adaptation plural user detector(26) according to the result and performs a plural user detection method on the users positioned at the same position.

Abstract translation: 目的：提供CDMA（码分多址）的时空阵列接收系统及其方法，以便在多径信道环境下容易地消除位于CDMA系统中相同区域的多个用户的信号，从而增加数量 的反向通道。 构成：信号处理单元（20）包括将从阵列天线（10）接收的多个信号改变成基带数字信号的多通道阵列接收器（21）。 到达角度和光束系数估计器（23）基于从多通道阵列接收器（21）输出的信号估计接收信号的到达角度和波束形成系数。 数字波束形成装置（22）通过将从多通道阵列接收器（21）输出的信号乘以估计的波束形成系数来形成最佳定向波束。 耙式接收器（24）将从数字波束形成装置（22）输出的信号与最大比率相结合，以最大化用户信号与噪声功率的信号功率噪声。 适应多用户检测器（25）将相同的信道干扰信号与从耙式接收器（24）输出的信号相抵消。 控制器（26）基于估计用户的到达角度来判断用户是否处于相同位置，然后根据结果控制适配多用户检测器（26），并对该用户检测方法 用户位于同一位置。

公开(公告)号：KR1020030021434A

公开(公告)日：2003-03-15

申请号：KR1020010054710

申请日：2001-09-06

Applicant: 한국전자통신연구원

Inventor： 김동우 ,  조대순 ,  조성철 ,  이유로 ,  정인철 ,  권동승 ,  경문건

IPC: H04B7/216

CPC classification number: H04W72/082 ,  H04B7/216 ,  H04W16/04 ,  H04W72/0446

Abstract: PURPOSE: An adaptive code bank managing method for allocating code channels in a mobile communication system and an apparatus therefor are provided to calculate the maximum number of allocable code channels according to wireless channel environments, and to adaptively vary the code bank by the size of communication traffic, so as to improve efficiency in communication channel use. CONSTITUTION: If a request for using code channels is generated, a channel number adjustor of a code bank management unit calculates the number of necessary code channels(S100,S110). The channel number adjustor calculates a link gain between a mobile station and a base station, on the basis of power amount allocated to all currently used code channels, total noise and interference amount, and SIR(Signal-to-Interference Rate)(S120,S130). The channel number adjustor calculates the number of additionally allocable code channels(S140). The channel number adjustor calculates the size of a code bank(S150). A channel allocator compares the number of necessary codes with the number of available channel codes(S160). If the number of necessary codes is larger, the channel allocator declares the failure of code channel allocation(S170). And if the number of necessary codes is smaller, the channel allocator allocates code channels(S180).

Abstract translation: 目的：提供一种用于在移动通信系统中分配代码信道的自适应代码库管理方法及其装置，用于根据无线信道环境计算可分配代码信道的最大数量，并根据通信的大小自适应地改变代码库 流量，从而提高通信渠道使用效率。 构成：如果生成了使用代码通道的请求，则代码库管理单元的通道号调整器计算必要代码通道的数量（S100，S110）。 信道号调整器基于分配给所有当前使用的码信道的功率量，总噪声和干扰量以及SIR（信号对干扰率）来计算移动台和基站之间的链路增益（S120， S130）。 信道编号调整器计算附加可分配的码信道的数量（S140）。 通道编号调节器计算代码库的大小（S150）。 信道分配器将必要代码的数量与可用信道码的数量进行比较（S160）。 如果需要的代码数量较多，则通道分配器声明代码通道分配失败（S170）。 并且，如果必要代码的数量较少，则信道分配器分配代码信道（S180）。

公开(公告)号：KR1020030017193A

公开(公告)日：2003-03-03

申请号：KR1020010051365

申请日：2001-08-24

Applicant: 한국전자통신연구원

Inventor： 홍대식 ,  고균병 ,  정인철 ,  조대순 ,  조성철 ,  이유로 ,  권동승 ,  경문건

IPC: H04B1/7107

CPC classification number: H04B1/71075 ,  H04B1/7093

Abstract: PURPOSE: A multiuser interference cancellation receiver for a TDD-CDMA(Time Division Duplex-Code Division Multiple Access) system and a method for controlling the interference cancellation are provided to perform interference cancellation for signals having high power values even when differences of signal power values are wide among users, so as to minimize errors in the detection of user signals having low signal power values. CONSTITUTION: A data extractor(100) extracts data from received signals and outputs the extracted data. A signal delay part(200) delays the signals outputted from the data extractor(100) during a predetermined time, and outputs the delayed signals. An interference cancellation selection part(300) extracts midamble signal channels from received original signals, to select and output users of the subject of the first interference cancellation. The first step interference cancellation block(400) receives data of the received signals from the data extractor(100), to perform the first parallel interference cancellation for the selected users of the first interference cancellation subject and output reproduction signals. And the second step interference cancellation block(500) receives data of the received signals delayed during the predetermined time and outputted from the signal delay part(200), to perform the second parallel interference cancellation using the first reproduction signals outputted from the first step interference cancellation block(400).

Abstract translation: 目的：提供用于TDD-CDMA（时分双工码分多址）系统的多用户干扰消除接收机和用于控制干扰消除的方法，以便即使在信号功率值差 在用户中广泛，以便最小化检测具有低信号功率值的用户信号的错误。 构成：数据提取器（100）从接收信号中提取数据并输出提取的数据。 信号延迟部分（200）在预定时间内延迟从数据提取器（100）输出的信号，并输出延迟的信号。 干扰消除选择部分（300）从接收到的原始信号中提取中置信号信道，以选择和输出第一干扰消除对象的用户。 第一级干扰消除块（400）从数据提取器（100）接收接收到的信号的数据，以对第一干扰消除对象的选定用户和输出再现信号执行第一并行干扰消除。 并且第二级干扰消除块（500）接收在预定时间内延迟并从信号延迟部分（200）输出的接收信号的数据，以使用从第一级干扰输出的第一再现信号执行第二并联干扰消除 消除块（400）。

公开(公告)号：KR1020020039424A

公开(公告)日：2002-05-27

申请号：KR1020000069229

申请日：2000-11-21

Applicant: 한국전자통신연구원

Inventor： 경문건 ,  박재준

IPC: H04B7/216

CPC classification number: H04L1/0618 ,  H04B1/712 ,  H04L1/0631

Abstract: PURPOSE: A system for receiving an ultra-high performance space-time array of a fading adaptive type and a method thereof are provided to select a correlation length of a pilot channel in adaptable and perform a correlation using a variation amount of a fading channel obtained through a doppler frequency estimation and a data rate of a receiving signal when a pilot channel is correlated for compensating a distortion phenomenon by a fading channel in a reverse direction link of a CDMA wireless communication system applying an array antenna. CONSTITUTION: A plurality of digital beam forming networks(120) perform a space filtering by multiplying a receiving signal which is received from a plurality of antennas and converted into a digital signal by a weight value vector according to each multiple path signal, and forms a beam. A plurality of demodulators(160) demodulate output signals of a plurality of digital beam forming networks. A pilot channel correlator estimates a fading channel using a pilot signal in the demodulators(160). A doppler frequency estimation unit(150) receives an output of the pilot channel correlator and estimates a doppler frequency of the fading channel. A microprocessor(180) supplies data rate information of a received signal and controls a signal flow. A correlation length selection unit(140) receives a doppler frequency estimation value estimated from the doppler frequency estimation unit(150) and a data rate of a received signal and decides a correlation length of the pilot channel correlator. A reference signal generator(170) receives outputs of a plurality of fingers and generates a reference signal. A plurality of weight value vector estimators receive an output of the reference signal generator(170) and the receiving signal and supplies the digital beam forming network(120).

Abstract translation: 目的：提供一种用于接收衰落自适应类型的超高性能时空阵列及其方法的系统，用于选择可适应的导频信道的相关长度，并使用获得的衰落信道的变化量来执行相关性 通过多普勒频率估计和当导频信道相关联的接收信号的数据速率时，通过应用阵列天线的CDMA无线通信系统的反向链路中的衰落信道来补偿失真现象。 构成：多个数字波束形成网络（120）通过将从多个天线接收的接收信号相乘并根据每个多路径信号被加权值向量转换为数字信号来执行空间滤波，并形成 光束。 多个解调器（160）解调多个数字波束形成网络的输出信号。 导频信道相关器使用解调器（160）中的导频信号来估计衰落信道。 多普勒频率估计单元（150）接收导频信道相关器的输出并估计衰落信道的多普勒频率。 微处理器（180）提供接收信号的数据速率信息并控制信号流。 相关长度选择单元（140）接收从多普勒频率估计单元（150）估计的多普勒频率估计值和接收信号的数据速率，并确定导频信道相关器的相关长度。 参考信号发生器（170）接收多个手指的输出并产生参考信号。 多个权重值向量估计器接收参考信号发生器（170）的输出和接收信号并提供数字波束形成网络（120）。

公开(公告)号：KR1020020037635A

公开(公告)日：2002-05-22

申请号：KR1020000067696

申请日：2000-11-15

Applicant: 한국전자통신연구원

Inventor： 박형근 ,  경문건

IPC: H04B7/216

CPC classification number: H04B7/0617 ,  H04B7/0621 ,  H04B7/2628

Abstract: PURPOSE: An apparatus for operating a forward beam formation weight value in a spreading CDMA(Code Division Multiple Access) BTS(Base Transceiver Station) using an array antenna, and a system for forming a forward beam using the same and a method therefor are provided to simply its structure, minimize interference to other terminals, and enhance a power emitted at an angle in which a desired terminal is located by performing beam formation using a response vector instead of channel information received from the terminal. CONSTITUTION: A plurality of normalizers(201) normalize receipt array response vectors in which the transfer function component of a receiving unit is removed, remove fading components, and obtain receipt antenna response vectors. A plurality of antenna response converters(202) convert the receipt antenna response vectors obtained in a plurality of normalizers(201) into transmission antenna response vectors. A plurality of vector outer product arithmetic units(203) receive the transmission antenna response vectors from a plurality of antenna response converters(202) and generate a space correlation matrix to each user using vector outer product. A matrix adder(204) receives the space correlation matrixes from a plurality of vector outer product arithmetic units(203), adds the received space correlation matrixes, and generates a space correlation matrix to all users. An inverse matrix arithmetic unit(205) receives the space correlation matrix to all users from the matrix adder(204) and obtains an inverse matrix. A plurality of matrix multipliers(206) multiply the inverse matrix received from the inverse matrix arithmetic unit(205) and the transmission antenna response vectors received from a plurality of antenna response converters(202), and operate forward beam formation weight values.

Abstract translation: 目的：提供一种在使用阵列天线的扩频CDMA（码分多址）BTS（基站收发台）中操作前向波束形成权重值的装置，以及用于使用该方法形成前向波束的系统及其方法， 简化其结构，最小化对其他终端的干扰，并且通过使用响应向量来代替从终端接收的信道信息，通过执行波束形成来增强以期望终端所位于的角度发射的功率。 构成：多个归一化器（201）对接收单元的传递函数分量被去除的接收阵列响应向量进行归一化，去除衰落分量，并获得接收天线响应矢量。 多个天线响应转换器（202）将在多个归一化器（201）中获得的接收天线响应矢量转换成发射天线响应矢量。 多个向量外积运算单元（203）从多个天线响应转换器（202）接收发送天线响应向量，并使用向量外积生成每个用户的空间相关矩阵。 矩阵加法器（204）从多个向量外积运算单元（203）接收空间相关矩阵，将接收到的空间相关矩阵相加，并向所有用户生成空间相关矩阵。 逆矩阵运算单元（205）从矩阵加法器（204）接收所有用户的空间相关矩阵，并获得逆矩阵。 多个矩阵乘法器（206）将从逆矩阵运算单元（205）接收的逆矩阵和从多个天线响应转换器（202）接收的发送天线响应矢量相乘，并且操作正向波束形成权重值。

公开(公告)号：KR1020010009587A

公开(公告)日：2001-02-05

申请号：KR1019990028020

申请日：1999-07-12

Applicant: 한국전자통신연구원

Inventor： 장경희 ,  박형래 ,  경문건 ,  신응순 ,  강양기 ,  박윤옥

IPC: H01Q3/40 ,  H01Q21/00

CPC classification number: H04B1/7115 ,  H01Q3/2605 ,  H04B1/709 ,  H04B7/086

Abstract: PURPOSE: An efficient structure demodulator is provided to utilize not only information in a time area but also information in a space area. CONSTITUTION: A correlator bank(112) receives a digital base band signal(101) to calculate a correlation with a local code sequence. A beam forming calculator(102) receives the digital base band signal(101) to calculate a beam forming weight factor based upon the correlated value of the correlator bank(112). A beam forming multiplier(110) for a finger receives the digital base band signal(101) to multiply the beam forming weight factor(115) and then process a summing. A beam forming multiplier(104) for a searcher receives the digital base band signal(101) to multiply the beam forming weight factor(103) and then process a summing. A searcher bank(106) receives an output signal from the beam forming multiplier(104). A finger bank(109) receives an output signal from the beam forming multiplier(110) to perform a multipath tracking based upon an output signal(108) of the searcher bank(106), and supply a multipath tracking signal to the correlator bank(112). A multipath coupler(117) receives a multipath tracking result signal from the finger bank(109) to process a multipath coupling and output a result to a decoder.

Abstract translation: 目的：提供一种有效的结构解调器，不仅可以利用时区中的信息，还可以利用空间区域中的信息。 构成：相关器组（112）接收数字基带信号（101）以计算与本地码序列的相关性。 波束形成计算器（102）接收数字基带信号（101），以基于相关器组（112）的相关值来计算波束形成权重因子。 用于手指的波束形成乘法器（110）接收数字基带信号（101）以乘以波束形成权重因子（115），然后处理求和。 用于搜索器的波束形成乘法器（104）接收数字基带信号（101）以乘以波束形成权重因子（103），然后处理求和。 搜索器组（106）从波束形成乘法器（104）接收输出信号。 手指组（109）从波束形成乘法器（110）接收输出信号，以根据搜索器组（106）的输出信号（108）进行多径跟踪，并向相关器存储体提供多径跟踪信号 112）。 多径耦合器（117）从手指组（109）接收多径跟踪结果信号，以处理多径耦合并将结果输出到解码器。

公开(公告)号：KR100155333B1

公开(公告)日：1998-11-16

申请号：KR1019950054531

申请日：1995-12-22

Applicant: 한국전자통신연구원

Inventor： 경문건 ,  박기홍 ,  한기철

IPC: H04B1/7087

Abstract: 본 발명은 무선 통신시스템에 관한 것으로 특히, 옥내외 60~600미터의 반경 내에서 대역확산 코드 한 개를 공통으로 사용하여 기지국(base station:BS)과 다수의 이동 단말기(mobile terminal:MT)들 사이에서 복수개의 패킷을 동시에 수신처리할 수 있도록 TDD(Time Division Duplex)방식을 사용하는 지역 무선 패킷 통신시스템에 관한 것이다.

公开(公告)号：KR100114380B1

公开(公告)日：1997-04-16

申请号：KR1019940025169

申请日：1994-09-30

Applicant: 한국전자통신연구원

Inventor： 경문건

IPC: H04B7/26

公开(公告)号：KR100041609B1

公开(公告)日：1991-05-07

申请号：KR1019870014079

申请日：1987-12-10

Applicant: 한국전자통신연구원 ,  주식회사 케이티

Inventor： 경문건 ,  백제인 ,  이형호

IPC: H04M3/00 ,  H04Q1/30

公开(公告)号：KR1019910000652B1

公开(公告)日：1991-01-31

申请号：KR1019870014079

申请日：1987-12-10

Applicant: 한국전자통신연구원 ,  주식회사 케이티

Inventor： 경문건 ,  백제인 ,  이형호

IPC: H04M3/00 ,  H04Q1/30

Abstract: The method comprises a first step for eliminating dial tone utilizing a filter (30) for detecting and discriminating efficient digit tone, a second step for modulating signal sampled by 8KHz descend sampling to 4KHz sampled signal, a third step for dividing sampled signal into high frequency band and low frequency band group digit tone, a fourth step for analyzing autocorelation of the digit tone, and a fifth step for transmitting result of signal detecting by deciding existancy of signal and frequency of signal.

Abstract translation: 该方法包括：利用滤波器​​（30）消除拨号音的第一步骤，用于检测和识别有效数字音调;第二步骤，用于将通过8KHz下降采样采样的信号调制到4KHz采样信号;第三步骤，用于将采样信号分频为高频 频带和低频带组数字音，用于分析数字音的自相关的第四步骤，以及通过决定信号的存在和信号的频率来发送信号检测结果的第五步骤。