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公开(公告)号：KR1020080042679A
公开(公告)日：2008-05-15
申请号：KR1020070102609
申请日：2007-10-11
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2607 , H04L27/2636 , H04L27/2644 , H04W72/0453
Abstract: A transmitter and a transmission method for extending a guard interval for an individual user equipment in an OFDMA(Orthogonal Frequency Division Multiple Access) system are provided to enhance performance of a specific equipment and performances of other equipments by extending the guard interval for the specific equipment. A transmitter for extending a guard interval for an individual user equipment in an OFDMA system includes a guard interval expansion processor(44), an up-sampling processing device(45), an interpolator(46), and a cyclic prefix(CP) inserting device(48). The guard interval expansion processor creates symbols having an extended guard interval by extending a guard interval for data to be transmitted to equipments estimated to have large delay spread and a large timing error on the basis of distance information between a base station and the equipment. The up-sampling processing device receives the symbols outputted from the guard interval extending processing device and performs up-sampling. The interpolator performs interpolation for the symbols up-sampled by the up-sampling processing device. The cyclic prefix inserting device inserts a cyclic prefix symbol into output data of a parallel/serial converter(47).
Abstract translation: 提供了一种用于在OFDMA（正交频分多址）系统中扩展单个用户设备的保护间隔的发射机和传输方法，以通过扩展特定设备的保护间隔来增强特定设备的性能和其他设备的性能 。 用于在OFDMA系统中为单个用户设备延长保护间隔的发射机包括保护间隔扩展处理器（44），上采样处理设备（45），内插器（46）和循环前缀（CP）插入 装置（48）。 保护间隔扩展处理器通过基于基站和设备之间的距离信息，将估计为具有大的延迟扩展的设备和大的定时误差扩展到要发送的数据的保护间隔来创建具有扩展保护间隔的符号。 上采样处理装置接收从保护间隔延长处理装置输出的符号，并进行上采样。 内插器对由上采样处理装置上采样的符号执行插值。 循环前缀插入装置将循环前缀符号插入到并行/串行转换器（47）的输出数据中。
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公开(公告)号：KR100795562B1
公开(公告)日：2008-01-21
申请号：KR1020060109886
申请日：2006-11-08
Applicant: 한국전자통신연구원
CPC classification number: H04B7/0413 , H04L25/0204 , H04L25/0246 , H04L25/03171
Abstract: A method for detecting a transmission signal by applying a division and detection scheme and a device thereof are provided to reduce calculation complexity for the signal detection while guaranteeing performance in detecting the signal whose strength is more than a set value by considering calculation amount for the performance in detecting the signal in an MIMO(Multiple Input Multiple Output) system. A device of a method for detecting a transmission signal by applying a division and detection scheme comprises a QR decomposition unit(100), a vector calculation unit(200), a division unit(300) and a detection unit(400). The QR decomposition unit(100) performs a resorted QR decomposition scheme for a matrix(B) which expresses a channel state, and obtains a unitary matrix(Q) and an upper triangle matrix(R). The vector calculation unit(200) multiplies a transpose of the unitary matrix(Q) by a received signal and calculates a vector. The division unit(300) divides the upper triangle matrix, inputted from the QR decomposition unit(100), into plural sub upper triangle matrixes, and also divides the vector, inputted from the vector calculation unit(200) in accordance with the divided plural sub upper triangle matrixes. The detection unit(400) detects mesh points in accordance with each divided sub vectors by using the plural sub upper triangle matrixes.
Abstract translation: 提供一种通过应用分割和检测方案及其装置来检测发送信号的方法，以减少信号检测的计算复杂度，同时通过考虑性能的计算量来确保强度大于设定值的信号的检测性能 在MIMO（多输入多输出）系统中检测信号。 通过应用分割和检测方案来检测发送信号的方法的装置包括QR分解单元（100），向量计算单元（200），分割单元（300）和检测单元（400）。 QR分解单元（100）对表示信道状态的矩阵（B）执行退化QR分解方案，并获得酉矩阵（Q）和上三角矩阵（R）。 矢量计算单元（200）将酉矩阵（Q）的转置乘以接收信号并计算矢量。 分割单元（300）将从QR分解单元（100）输入的上三角矩阵分割成多个子上三角矩阵，并且还根据分割的多个向量计算向量计算单元（200）输入的向量 子上三角矩阵。 检测单元（400）通过使用多个子上三角矩阵，根据每个划分的子向量来检测网格点。
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公开(公告)号：KR100790366B1
公开(公告)日：2008-01-03
申请号：KR1020060112379
申请日：2006-11-14
Applicant: 한국전자통신연구원 , 한양대학교 산학협력단
CPC classification number: H04B7/0857 , H04L25/0204 , H04L25/0248 , H04L25/0256 , H04L25/03242 , H04L2025/03426 , H04L2025/03624 , H04B7/0854
Abstract: A detection apparatus in a MIMO(Multi Input Multi Output) system and a method thereof are provided to reduce the volume of operations for decoding Rx signals of a receiving block while maintaining a desired system performance and to obtain a BER(Bit Error Rate) performance similar to an SD(Sphere Decoding) detection method. A detection apparatus in a MIMO system comprises the first detection unit(11), a candidate element determination unit(12), an Rx signal cancellation unit(13), and the second detection unit(14). The first detection unit(11) decodes an Rx signal. The candidate element determination unit(12) calculates an instantaneous SINR value for each of the elements of the decoded vector, compares each calculated instantaneous SINR value with a threshold, and determines elements to directly estimate Tx data from the decoded vector. The Rx signal cancellation unit(13) creates a signal for the determined elements, cancels the created signal from the initial Rx signal, and outputs a modified Rx signal. The second detection unit(14) receives the modified Rx signal from the Rx signal cancellation unit(13) and decodes it using a more delicate detecting method than the first detection unit(11).
Abstract translation: 提供了一种MIMO（多输入多输出）系统中的检测装置及其方法，用于减少用于解码接收块的Rx信号的操作量，同时保持期望的系统性能并获得BER（误码率）性能 类似于SD（球体解码）检测方法。 MIMO系统中的检测装置包括第一检测单元（11），候选元素确定单元（12），Rx信号消除单元（13）和第二检测单元（14）。 第一检测单元（11）对Rx信号进行解码。 候选元素确定单元（12）计算解码矢量的每个元素的瞬时SINR值，将每个计算的瞬时SINR值与阈值进行比较，并且确定从解码矢量直接估计Tx数据的元素。 Rx信号消除单元（13）产生用于所确定的元件的信号，从初始Rx信号中消除所产生的信号，并输出经修改的Rx信号。 第二检测单元（14）从Rx信号消除单元（13）接收修改的Rx信号，并且使用比第一检测单元（11）更精确的检测方法对其进行解码。
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公开(公告)号：KR100790365B1
公开(公告)日：2008-01-02
申请号：KR1020060112378
申请日：2006-11-14
Applicant: 한국전자통신연구원
CPC classification number: H04B7/0691 , H04B7/0854 , H04B7/0874 , H04B17/309 , H04L1/0026 , H04L1/06 , H04L1/1893 , H04B7/0417 , H04B7/0623 , H04B7/0632
Abstract: A method for retransmitting packets in a MIMO(Multi Input Multi Output) system is provided to increase decoding performance for retransmitted packets by selecting an antenna having a better channel state in the case of retransmitting packets for which decoding failed. A receiving block in a MIMO system comprises OFDM(Orthogonal Frequency Division Multiplex) demodulators(21), an MMSE(Minimum Mean-Squared Error) detector(22), a CQI(Channel Quality Information) calculator(23), a decoding part(24), and a packet canceller(25). The OFDM demodulators(21), which are in one-to-one correspondence with antennas, demodulate received RF signals. The MMSE detector(22) detects the channel states of the data inputted from the OFDM demodulators(21). The CQI calculator(23) calculates CQI for each channel detected by the MMSE detector(22) and feeds it back to a transmitting part. The decoding part(24) decodes data for each channel detected by the MMSE detector(22). The packet canceller(25) deletes the decoding-completed packets from the whole received signals.
Abstract translation: 提供了一种在MIMO（多输入多输出）系统中重传分组的方法，以通过在重新发送解码失败的分组的情况下选择具有更好信道状态的天线来增加重传分组的解码性能。 MIMO系统中的接收块包括OFDM（正交频分复用）解调器（21），MMSE（最小均方误差）检测器（22），CQI（信道质量信息）计算器（23），解码部分 24）和分组消除器（25）。 与天线一一对应的OFDM解调器（21）对接收到的RF信号进行解调。 MMSE检测器（22）检测从OFDM解调器（21）输入的数据的信道状态。 CQI计算器（23）计算由MMSE检测器（22）检测的每个信道的CQI，并将其馈送回发送部分。 解码部分（24）解码由MMSE检测器（22）检测的每个通道的数据。 分组消除器（25）从整个接收信号中删除解码完成分组。
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公开(公告)号：KR1020070112701A
公开(公告)日：2007-11-27
申请号：KR1020070011015
申请日：2007-02-02
Applicant: 한국전자통신연구원
CPC classification number: H04B7/15542 , H04B1/7103 , H04W16/00
Abstract: A repeater, a terminal, and a base station in a cellular system, and a method for relaying the base station with the terminal are provided to enable base stations to use the same range of resources while repeaters use resources orthogonal to resources used by neighboring repeaters, thereby magnifying resource usage efficiency. An interference terminal examiner(110) examines interfering terminals which apply interference to a repeater(100), and writes an interfering terminal list. A resource manager(130) perceives interference resource information allocated to the interfering terminals belonging to the interfering terminal list through resource allocation information of the base station, and perceives available resources except the interference resource information among resources allocated to the repeater. A repeater resource allocator(150) allocates some of or the whole available resources to the terminals.
Abstract translation: 提供蜂窝系统中的中继器，终端和基站，以及用于使终端与基站进行中继的方法，以使得基站能够使用相同的资源范围，而中继器使用与相邻中继器所使用的资源正交的资源 ，从而放大资源使用效率。 干扰终端检查器（110）检查对中继器（100）施加干扰的干扰终端，并写入干扰终端列表。 资源管理器（130）通过基站的资源分配信息感知分配给属于干扰终端列表的干扰终端的干扰资源信息，并且在分配给中继器的资源中感知除了干扰资源信息之外的可用资源。 中继器资源分配器（150）向终端分配一些或全部可用资源。
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Patent Agency Ranking
公开(公告)号：KR100543788B1
公开(公告)日：2006-01-20
申请号：KR1020030090151
申请日：2003-12-11
Applicant: 한국전자통신연구원 , 삼성전자주식회사 , 주식회사 케이티 , 에스케이브로드밴드주식회사 , 주식회사 케이티프리텔 , 에스케이텔레콤 주식회사
IPC: H03F1/32
Abstract: 본 발명은 적응형 역방향 다이오드 구조를 갖는 전력증폭기에 관한 것으로, 증폭부, 바이어스부 및 역방향 다이오드를 포함한다. 증폭부는 입력 고주파 신호를 선형 증폭하기 위해 적어도 하나 이상의 증폭 트랜지스터를 구비한다. 바이어스부는 증폭부의 베이스 단자와 기준 전압 사이에 연결되어, 증폭부에 대한 기준 바이어스 전압을 공급한다. 역방향 다이오드는 바이어스부와 증폭부에 입력 고주파 신호를 공급하는 구동단 사이에 연결되어, 구동단의 출력 고주파 신호 중 일부를 바이어스부로 커플링시킨다. 본 발명에 따르면, 역방향으로 바이어스된 다이오드가 구동단의 출력전력 세기에 따라 크기가 다른 RF 신호를 커플링시켜 바이어스 트랜지스터에 공급함으로써 전력단의 공급 DC 전류를 출력전력에 따라 적응적으로 공급하며, 이로 인해 작은 출력전력에서는 삽입 손실을 최소화하고 높은 출력전력에서는 높은 선형성을 확보할 수 있다. 또한, 본 발명에 따른 바이어스 회로는 아주 작게 구현될 수 있어 실제적인 단말기 전력증폭기에 용이하게 내장될 수 있다.
전력증폭기, 바이어스 회로, 적응형, 역방향 다이오드, 커플링,-
公开(公告)号：KR1020050064726A
公开(公告)日：2005-06-29
申请号：KR1020030096311
申请日：2003-12-24
Applicant: 한국전자통신연구원 , 삼성전자주식회사 , 주식회사 케이티 , 에스케이브로드밴드주식회사 , 주식회사 케이티프리텔 , 에스케이텔레콤 주식회사
IPC: H04B17/00
Abstract: 무선 시스템의 성능 측정시 사용되는 무선 채널 시뮬레이터의 페이딩 생성기의 전력을 보상하는 방법이 제공된다. 페이딩을 생성한 후, 페이딩의 순시 전력을 측정한다. 그리고 페이딩의 순시 전력으로부터 평균 전력을 계산하고, 이 평균 전력에 따라 페이딩을 보상한다. 이와 같이 하면, 페이딩의 순시 전력이 보상되어 페이딩의 평균 전력이 실질적으로 일정하게 유지된다.
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公开(公告)号：KR102246837B1
公开(公告)日：2021-04-30
申请号：KR1020200056475
申请日：2020-05-12
Applicant: 한국전자통신연구원
Abstract: 본발명의일실시예에따른조정자장치의통신방법은예약기반의매체접근제어를이용하는무선시스템의조정자장치(Coordinator)의통신방법에있어서, 소스장치가데스티네이션장치에게전송하는프레임이릴레이장치를경유하여중계될수 있도록하기위하여상기소스장치로부터상기릴레이장치를위한예약자원을요청하는프레임을수신하는단계; 및상기요청에따라상기릴레이장치를위한예약자원을할당하는단계를포함한다.
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公开(公告)号：KR102220465B1
公开(公告)日：2021-02-25
申请号：KR1020200047356
申请日：2020-04-20
Applicant: 한국전자통신연구원
Abstract: 동일한시간구간에복수의단말들에게전송기회를부여하는스케줄링방법및 이를위한장치가제공된다. 이와같은스케줄링방법은제어국이송수신단말및 전송시간구간을지정하는제1 스케줄링정보를망 내의단말들에전송하는단계와, 망내의단말들로부터단말간 간섭정보를포함하는채널측정정보를수신하는단계및 상기채널측정정보를이용하여서로간섭이없는복수의송수신단말과전송시간구간을지정하는제2 스케줄링정보를생성하는단계를포함한다.
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