公开(公告)号：KR1020080097359A

公开(公告)日：2008-11-05

申请号：KR1020080041066

申请日：2008-05-01

Applicant: 한국전자통신연구원

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

IPC: H04B7/204 ,  H04L1/18

CPC classification number: H04B7/12 ,  H04B7/2612

Abstract: A data re-transmission method by interference averaging and an apparatus using the same are provided to reduce interference by making orthogonal code groups for different mobile stations when repetitively transmitting data. A data re-transmission method by interference averaging between terminals in a mobile communication system comprises the following steps of: re-partitions a plurality of terminals into a plurality of subgroups so that terminals belonging to each subgroup can be different according to data re-transmission(S510); re-assigning orthogonal codes and resources to the terminals belonging to each subgroup(S530, S550); and assigning different frequency bands to the terminal whenever data is re-transmitted(S570).

Abstract translation: 提供通过干扰平均的数据重传方法和使用其的装置，以便在重复发送数据时通过为不同的移动台进行正交码组来减少干扰。 通过移动通信系统的终端之间的干扰平均的数据再传输方法包括以下步骤：将多个终端重新划分为多个子组，使得属于每个子组的终端可以根据数据重传而不同 （S510）; 对属于每个子组的终端重新分配正交码和资源（S530，S550）; 以及每当重新发送数据时，向终端分配不同的频带（S570）。

公开(公告)号：KR1020080086338A

公开(公告)日：2008-09-25

申请号：KR1020070132637

申请日：2007-12-17

Applicant: 한국전자통신연구원 ,  삼성전자주식회사

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

IPC: H04W36/14 ,  H04L12/56

Abstract: A handover method between wireless communication systems each using a different wireless access technology and a method for transmitting a forward synchronization signal therefore are provided to perform seamless handover by providing a frame structure including an SCH(Synchronous Channel)/P-BCH(Primary-Broadcasting Channel) supporting measurement of handover. An MS(Mobile Station)(500), which communicates with a home base station(S0) acquires information such as the number of transmission antennas of a target base station, and bandwidth information(S1). The MS reports the information to the home base station(S2). The home base station inquires a target base station(520) as to whether the MS can perform handover(S3). If there is available radio resources, the target base station informs the home base station accordingly(S4). The home base station instructs the MS to perform handover(S5). The MS transmits a handover preamble to the target base station(S6). The target base station allocates resources for data communication to the MS(S7). The MS communicates with the target base station with the allocated radio resources to thus complete inter RAT handover(S8).

Abstract translation: 因此，提供各自使用不同的无线接入技术的无线通信系统之间的切换方法以及用于发送正向同步信号的方法，通过提供包括SCH（同步信道）/ P-BCH（Primary-Broadcasting 频道）支持切换测量。 与家庭基站（S0）进行通信的MS（移动站）（500）获取诸如目标基站的发送天线的数量和带宽信息的信息（S1）。 MS向家庭基站报告信息（S2）。 家庭基站向目标基站（520）询问MS是否可以执行切换（S3）。 如果存在可用的无线电资源，则目标基站相应地通知家庭基站（S4）。 家庭基站指示MS执行切换（S5）。 MS向目标基站发送切换前导码（S6）。 目标基站向MS分配用于数据通信的资源（S7）。 MS利用分配的无线电资源与目标基站进行通信，从而完成RAT间切换（S8）。

公开(公告)号：KR1020080082429A

公开(公告)日：2008-09-11

申请号：KR1020070118516

申请日：2007-11-20

Applicant: 한국전자통신연구원

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

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

CPC classification number: H04L1/0606 ,  H04B7/0613 ,  H04B7/0697 ,  H04L1/0031 ,  H04L27/2662

Abstract: A signal transmission method is provided to apply transmission diversity methods of BCH(Broadcast Channel) information variously according to a distance between SCH(Synchronization Channel) information and the BCH information, thereby magnifying a time diversity gain within a TTI(Transmission Time Interval). Plural SCH and BCH symbols are assigned to plural symbol intervals, respectively. The first transmission diversity method is applied to the SCH symbols and BCH symbols adjacent to the SCH symbols. The second transmission diversity method is applied to the BCH symbols isolated from the SCH symbols. The SCH symbols and the BCH symbols are transmitted.

Abstract translation: 提供信号传输方法，以根据SCH（同步信道）信息和BCH信息之间的距离不同地应用BCH（广播信道）信息的传输分集方法，从而放大TTI（传输时间间隔）内的时间分集增益。 分别将多个SCH和BCH符号分配给多个符号间隔。 第一传输分集方法应用于与SCH符号相邻的SCH符号和BCH符号。 第二传输分集方法应用于从SCH符号隔离的BCH符号。 发送SCH符号和BCH符号。

公开(公告)号：KR1020080053188A

公开(公告)日：2008-06-12

申请号：KR1020070120715

申请日：2007-11-26

Applicant: 한국전자통신연구원 ,  삼성전자주식회사

Inventor： 이성준 ,  정재호 ,  박형근 ,  김성민 ,  이광천

IPC: H04B17/00

CPC classification number: H04B17/309 ,  H04B17/3911

Abstract: A wired link tester for checking the performance of a multiple antenna system is provided to configure wired links in response to wireless links for the multiple antenna system, thereby reproducing a status that a signal transmitted from a transmitting antenna is received to all receiving antennas. A wired link tester(120) is connected to a BS1(111), a BS2(112), a terminal(130), and an external computer(140) to configure a test environment. The wired link tester comprises a fast fading reproduction unit(200), a path loss reproduction unit(300), and a control unit(600). The fast fading reproduction unit makes the wired link tester configure 16 wired links in response to 16 wireless links for the maximum 4x4 multiple antenna system, and reproduces a status that a RF(Radio Frequency) signal transmitted from a transmitting antenna is received to all receiving antennas, and changes the characteristics of a variable attenuator and a variable phase shifter according to the control signal of the control unit to reproduce fast fading characteristics. The path loss reproduction unit forms 16 wired links with the fast fading reproduction unit, and changes the characteristics of a variable attenuator positioned at the path loss reproduction unit according to the control signal of the control unit to reproduce path loss characteristics. The control unit prestores a value for reproducing the characteristic of a wireless link and controls the fast fading reproduction unit and the path loss reproduction unit according to the prestored value.

Abstract translation: 提供了用于检查多天线系统的性能的有线链路测试器，以响应于多天线系统的无线链路来配置有线链路，由此再现从发射天线发射的信号被接收到所有接收天线的状态。 有线链路测试器（120）连接到BS1（111），BS2（112），终端（130）和外部计算机（140）以配置测试环境。 有线链路测试仪包括快速衰落再现单元（200），路径损耗再现单元（300）和控制单元（600）。 快速衰落再现单元使得有线链路测试仪响应于最大4×4多天线系统的16个无线链路来配置16个有线链路，并且再现从接收到发射天线发送的RF（射频）信号到所有接收的状态 天线，并且根据控制单元的控制信号改变可变衰减器和可变移相器的特性，以再现快速衰落特性。 路径损耗再现单元与快速衰落再现单元形成16个有线链路，并且根据控制单元的控制信号改变位于路径损耗再现单元的可变衰减器的特性，以再现路径损耗特性。 控制单元预先存储用于再现无线链路的特性的值，并且根据预存值控制快速衰落再现单元和路径损耗再现单元。

公开(公告)号：KR1020080052452A

公开(公告)日：2008-06-11

申请号：KR1020070125649

申请日：2007-12-05

Applicant: 한국전자통신연구원

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

IPC: H04B7/02 ,  H04B7/04 ,  H04L1/02 ,  H04L1/06

CPC classification number: H04B7/12 ,  H04B7/068 ,  H04L1/0606 ,  H04L5/0023 ,  H04L25/03343

Abstract: A method for transmitting a signal and information of an antenna, and a method for estimating the number of antennas are provided to enable a mobile station to demodulate a BCH(Broadcast Channel) as channel response obtained through a SCH(Synchronization Channel) by applying the multiple free coding vectors to the BCH and SCH timely close to each other. A base station creates a plurality of SCH symbols out of a cell group identifier and a cell identifier, at this time a part of information about the number of transmission antennas is added to the synchronization channel symbols(S210). The base station creates BCH symbols out of the rest information about the number of transmission antennas(S220). The base station creates a downstream frame by disposing the SCH symbols and the BCH symbols in a symbol section respectively(S230). And the base station transmits the downstream frame(S240).

Abstract translation: 提供一种用于发送天线的信号和信息的方法以及用于估计天线数量的方法，以使得移动台能够通过应用SCH（同步信道）通过SCH（同步信道）获得的信道响应来解调BCH（广播信道） BCH和SCH的多个自由编码向量及时接近。 基站从小区组标识符和小区标识符中创建多个SCH符号，此时将关于发送天线数量的一部分信息添加到同步信道符号（S210）。 基站在关于发送天线数量的休息信息之外创建BCH符号（S220）。 基站通过分别在符号部分中设置SCH符号和BCH符号来创建下行帧（S230）。 并且基站发送下行帧（S240）。

公开(公告)号：KR100819129B1

公开(公告)日：2008-04-03

申请号：KR1020070011507

申请日：2007-02-05

Applicant: 한국전자통신연구원

Inventor： 장갑석 ,  김일규 ,  박형근 ,  김영훈 ,  방승찬

IPC: H04L7/10 ,  H04L27/26 ,  H04B7/26

Abstract: 하향링크 신호 생성 장치와 셀 탐색 장치가 개시된다.
하향링크 신호 생성 장치는 시간 영역에서 복수의 반복 패턴이 형성되도록 하향링크 프레임의 복수의 동기 구간에 셀 그룹 인식용 코드 및 프레임 동기 인식용 코드를 코드 분할 다중화하여 배치한다. 그리고, 하향링크 신호 생성 장치는 하향링크 프레임을 시간 영역 신호로 변환하고, 시간 영역 신호를 셀 구간에 전송한다.
셀 탐색 장치는 수신 신호의 지연 신호와 수신 신호를 상관하여 상관값이 소정의 값 이상인 시점을 찾아 심볼 동기를 획득하고, 심볼 동기에 해당하는 심볼의 푸리에 변환된 신호로부터 제1 인식 코드의 번호와 제2 인식 코드의 번호를 획득한다. 그리고, 셀 탐색 장치는 제1 인식 코드의 번호를 통해 프레임 동기를 획득하고, 제2 인식 코드의 번호를 통해 셀 그룹의 번호를 판단하여 셀을 식별한다.
프레임, 동기, 셀 탐색, 셀 그룹, 하향링크 신호

公开(公告)号：KR1020080020959A

公开(公告)日：2008-03-06

申请号：KR1020070088097

申请日：2007-08-31

Applicant: 한국전자통신연구원

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

IPC: H04J13/18

CPC classification number: H04W72/04 ,  H04J11/00 ,  H04J13/0074 ,  H04L1/1692 ,  H04L1/1861 ,  H04L1/1887 ,  H04L5/0021 ,  H04L5/0048 ,  H04L5/0053 ,  H04L25/03866 ,  H04L27/2602

Abstract: A method and an apparatus for transmitting an uplink signal, and a method and an apparatus for generating the uplink signal in a communication system are provided to randomize the interference between users and between cells in a frequency domain CDM(Cond Division Multiplexing) method. A method for transmitting an uplink signal in a terminal comprises the steps of: transmitting a first transmission symbol multiplied by a first sequence for distinguishing the terminal from other terminal, in a first transmission time; and transmitting a second transmission symbol multiplied by a second sequence for distinguishing the terminal from other terminal, in a second transmission time which is different from the first transmission time. The second sequence is different from the first sequence.

Abstract translation: 提供一种用于发送上行链路信号的方法和装置，以及用于在通信系统中生成上行链路信号的方法和装置，用于随机化频域CDM（Cond Division Multiplexing）方法中的用户之间和小区之间的干扰。 一种用于在终端中发送上行链路信号的方法包括以下步骤：在第一传输时间中，发送乘以第一序列的第一传输符号，以区分终端与其他终端; 以及在与第一传输时间不同的第二传输时间中，传送乘以用于将终端与其他终端区分开的第二序列的第二传输符号。 第二个序列与第一个序列不同。

公开(公告)号：KR100789784B1

公开(公告)日：2007-12-28

申请号：KR1020060125161

申请日：2006-12-08

Applicant: 한국전자통신연구원

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

IPC: H04B1/10 ,  H04B1/06 ,  H04B1/18

CPC classification number: H04W72/0406 ,  H04B1/30 ,  H04B1/406

Abstract: A receiving device for supporting scalable bandwidths and a method thereof are provided to control bandwidths by using a scalable LPF(Low Pass Filter), and to control sampling frequencies of an A/D(Analog to Digital) converter, thereby supporting the scalable bandwidths. A BPF(Band Pass Filter)(202) filters receiving RF(Radio Frequency) signals. An LO(Local Oscillator)(204) oscillates frequencies to output LO frequencies. A mixer(203) down-converts the RF signals by using the LO frequencies. A scalable LPF(205) filters the down-converted signals as controlling bandwidths. An AGC(Automatic Gain Control) unit(206) controls gains of the filtered signals. An A/D converter(207) converts analog signals of the AGC unit(206) into digital signals by using sampling frequencies suitable for the corresponding bandwidths. A controller(208) demodulates the digital signals, outputs a central frequency control signal to the LO(204) according to control information of an upper layer, outputs a bandwidth control signal to the scalable LPF(205), and outputs an ADC control signal to the A/D converter(207).

Abstract translation: 提供用于支持可扩展带宽的接收设备及其方法，以通过使用可扩展LPF（低通滤波器）来控制带宽，并且控制A / D（模/数）转换器的采样频率，从而支持可扩展带宽。 BPF（带通滤波器）（202）滤波接收RF（射频）信号。 LO（本地振荡器）（204）振荡频率以输出LO频率。 混频器（203）通过使用LO频率对RF信号进行下变频。 可缩放LPF（205）将下变频信号作为控制带宽进行滤波。 AGC（自动增益控制）单元（206）控制滤波信号的增益。 A / D转换器（207）通过使用适合相应带宽的采样频率将AGC单元（206）的模拟信号转换为数字信号。 控制器（208）对数字信号进行解调，根据上层的控制信息向LO（204）输出中心频率控制信号，向可伸缩LPF（205）输出带宽控制信号，并输出ADC控制信号 到所述A / D转换器（207）。

公开(公告)号：KR100768511B1

公开(公告)日：2007-10-18

申请号：KR1020060042804

申请日：2006-05-12

Applicant: 한국전자통신연구원

Inventor： 김일규 ,  김영훈 ,  방승찬 ,  박형근

IPC: H04B7/06 ,  H04L27/26

Abstract: 본 발명은 MC-CDMA(Multi Carrier-Code Division Multiple Access) 시스템의 송신 다이버시티 방법, MC-CDMA 시스템의 기지국 송신기, 분산 MC-CDMA(Scattered Multi Carrier-Code Division Multiple Access) 시스템의 송신 다이버시티 방법 및 분산 MC-CDMA 시스템의 기지국 송신기에 관한 것이다. 본 발명에 따르면, a) 입력 심벌을 해당 직교 코드로 주파수 영역에서 확산하여 복수의 부 반송파를 통해 출력하고, 소정 안테나 수에 따라 상기 a) 단계의 출력 신호를 그룹핑하여, 그룹별로 각기 다른 안테나를 통해 상기 신호를 전송한다.
따라서, 안테나 수에 대한 제약 없이 송신 다이버시티 기법을 적용할 수 있으며, 특히 OFDM 심벌 구간 및 부 반송파가 서로 인접해 있지 않은 분산 MC-CDMA 방식에도 적용할 수 있다.
Multi Carrier-CDMA, Diversity, STBC (Space Time Block Coding)

公开(公告)号：KR100758307B1

公开(公告)日：2007-09-12

申请号：KR1020060089271

申请日：2006-09-14

Applicant: 한국전자통신연구원

Inventor： 이문식 ,  박형근 ,  김영훈 ,  방승찬

IPC: H04L27/26

CPC classification number: H04L27/265 ,  H04B7/0617 ,  H04B7/08 ,  H04L27/01 ,  H04L27/2695

Abstract: A receiving apparatus of a SC-FDMA(Single Carrier-Frequency Division Multiple Access) communication system is provided to realize an SBF(Switched Beam Former) in real-time by simplifying the structure of the SBF and reducing complexity. A receiving apparatus of a SC-FDMA communication system includes a preprocessing unit(230). At least one preprocessing unit(230) converts a series signal without a CP(Cyclic Prefix) into a data symbol signal in a frequency area to demap the converted data symbol signal to a subcarrier after converting the series signal without the CP into a parallel signal. At least one beam forming unit applies a beam weight vector to each data symbol signal demapped from the preprocessing unit(230). At least one channel presuming unit presumes each channel using a pilot signal among the signals outputted from the preprocessing unit(230). At least one frequency equalizer unit compensates for the corresponding data symbol signal which the beam weight vector of the beam forming unit is applied to at the frequency area using each channel presuming value presumed from the channel presuming unit. A beam coupling unit(210) couples the data symbol signal compensated from the frequency equalizer unit by the subcarrier. An IDFT(Interleaved FDMA) processing unit(211) processes the data symbol signal coupled from the beam coupling unit(210) with IDFT.

Abstract translation: 提供SC-FDMA（单载波 - 频分多址）通信系统的接收装置，通过简化SBF的结构并降低复杂度来实时实现SBF（交换波束形成器）。 SC-FDMA通信系统的接收装置包括预处理单元（230）。 至少一个预处理单元（230）将没有CP（循环前缀）的串联信号转换成频率区域中的数据符号信号，以便在将没有CP的串行信号转换成并行信号之后将转换的数据符号信号解映射到子载波 。 至少一个波束形成单元对从预处理单元（230）解映射的每个数据符号信号应用波束权重向量。 至少一个信道推定单元在从预处理单元（230）输出的信号中使用导频信号来假设每个信道。 至少一个频率均衡器单元使用从信道推定单元推定的每个信道推定值来补偿波束形成单元的波束权重向量在频率区域被应用的相应数据符号信号。 光束耦合单元（210）将从频率均衡器单元补偿的数据符号信号耦合子载波。 IDFT（交错FDMA）处理单元（211）使用IDFT处理从光束耦合单元（210）耦合的数据符号信号。