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公开(公告)号：KR1020090065165A
公开(公告)日：2009-06-22
申请号：KR1020070132624
申请日：2007-12-17
CPC classification number: H04B7/0617 , H04B7/0632 , H04B7/0639 , H04W16/28 , H04B1/76
Abstract: A beam forming method is provided to design a beam according to a degree of correlation of a channel, thereby optimizing performance of a random beam forming method including a COBF(Codebook-based Opportunistic Beamforming) method and a CBF-CR(Codebook-based Beamforming with Code Rotation) method. A base station designs a beam(S110). The base station determines an optimized beam among Q beams(S120). The base station pre-codes data by multiplying the optimized beam to data to transmit(S130). The base station transmits the data through transmitting antennas by inserting a pilot to the pre-coded data(S140).
Abstract translation: 提供了一种波束形成方法，以根据信道的相关程度来设计波束，从而优化包括COBF（基于码本的机会波束形成）方法和CBF-CR（基于码本的波束形成）的随机波束形成方法的性能 与代码旋转）方法。 基站设计光束（S110）。 基站确定Q波束中的优化波束（S120）。 基站通过将优化的波束与要发送的数据相乘来对数据进行预编码（S130）。 基站通过将导频插入到预编码数据中，通过发送天线发送数据（S140）。
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公开(公告)号：KR1020090062905A
公开(公告)日：2009-06-17
申请号：KR1020070130389
申请日：2007-12-13
IPC: H04B7/06
CPC classification number: H04B7/0452 , H04B7/0434 , H04B7/0439 , Y02D70/142 , Y02D70/444
Abstract: A transmission interference cancellation method for MU-MIMO(Multi User Multi Input Multi Output) is provided to determine a permutation matrix for minimizing transmission power, thereby supplying a superior transmission interference cancellation method with low complexity. A transmitter multiplies a channel matrix by a permutation matrix and performs QR decomposition(S210). The transmitter determines the permutation matrix(S220). The transmitter determines the second matrix by using the determined optimum permutation matrix and obtains a transmission free coding vector by using the determined second matrix and the transmission data vector.
Abstract translation: 提供了一种用于MU-MIMO（多用户多输入多输出）的传输干扰消除方法，以确定用于最小化传输功率的置换矩阵，从而提供低复杂度的优良传输干扰消除方法。 发射机将信道矩阵乘以置换矩阵并执行QR分解（S210）。 发射机确定置换矩阵（S220）。 发射机通过使用确定的最优置换矩阵来确定第二矩阵，并通过使用所确定的第二矩阵和传输数据向量来获得无传输编码矢量。
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公开(公告)号：KR1020090028170A
公开(公告)日：2009-03-18
申请号：KR1020070093542
申请日：2007-09-14
CPC classification number: H04B7/0617 , H04B7/0417 , H04B7/0632
Abstract: A multiple beam forming method for gaining the multi-user diversity gain and an apparatus thereof are provided to increase multi user diversity gain by using one matrix and utilize space freedom by multi antenna by using multi beam every time slot. A user terminal grouping unit groups user terminals by using feedback information received from each user terminal(S240). A base station scheduler uses the feedback information of the user terminal and the coding word. The user terminal in which the base station scheduler assigns each stream is determined(S250). The COMBF precoder of the base station uses the determined coding word and the unitary matrix promised between transmitter and receiver(S260). A multiplexer multiplexes the outputs of the COMBF precoder. The multiplexer inserts the MIMO midamble and the electrical transmission is performed through a plurality of transmission antenna(S270).
Abstract translation: 提供了用于获得多用户分集增益的多波束形成方法及其装置，以通过使用一个矩阵来增加多用户分集增益，并且通过每时隙使用多个波束来利用多天线的空间自由度。 用户终端分组单元通过使用从每个用户终端接收到的反馈信息来分组用户终端（S240）。 基站调度器使用用户终端和编码字的反馈信息。 确定基站调度器分配每个流的用户终端（S250）。 基站的COMBF预编码器使用所确定的编码字和发射机和接收机之间承诺的酉矩阵（S260）。 复用器复用COMBF预编码器的输出。 多路复用器插入MIMO中间码，并且通过多个发射天线执行电传输（S270）。
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公开(公告)号：KR1020090026448A
公开(公告)日：2009-03-13
申请号：KR1020070091424
申请日：2007-09-10
CPC classification number: H04B1/76 , H04L27/2613
Abstract: A pilot arrangement method in a multiple antenna communications system capable of reducing the complexity of the system without performing puncturing or truncation is provided to maximize entire data transmission speed due to dividing wireless resource into data transmission part and a pilot transmission part. A plurality of pilot chips transmitted from each transmission antenna is produced by dividing a plurality of transmission antennas into groups of the plurality including at least transmission antenna(S100). A temporal domain allocated to each transmission antenna of the first group is arranged to a first frequency domain through each transmission antenna(S120). A second pilot is arranged on the second time domain. The chip pair about the second group is arranged on the period domain and the different second time domain(S130).
Abstract translation: 提供了能够在不执行删截或截断的情况下降低系统的复杂度的多天线通信系统中的导频排列方法，以便将无线资源分配到数据传输部分和导频传输部分中，以最大化整个数据传输速度。 通过将多个发送天线划分为至少包括发送天线的多个发送天线，生成从各发送天线发送的多个导频码片（S100）。 分配给第一组的每个发送天线的时域被布置成通过每个发送天线到第一频域（S120）。 在第二个时间域安排了第二个飞行员。 关于第二组的芯片对被布置在周期域和不同的第二时域上（S130）。
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公开(公告)号：KR100843251B1
公开(公告)日：2008-07-02
申请号：KR1020060033703
申请日：2006-04-13
Applicant: 한국전자통신연구원
IPC: H04B7/06
Abstract: 다중 안테나를 가진 송신 장치 및 다중 안테나를 이용한 신호 송신 방법이 개시된다.
다중 안테나 송신 장치는 송신을 위한 신호를 입력 받아 시공간 부호화 또는 주파수 공간 부호화를 수행하고, 부호화된 신호를 복수의 지연값을 통해 각각 순환적으로 지연시켜 복수의 지연 신호를 생성하며, 지연 신호를 공간 영역 및 지연값 별로 각각 다른 안테나를 통해 채널에 전송한다.
순환적 지연을 위한 지연값의 개수를 조정함으로써 송신 장치의 안테나 개수를 유연하게 확장할 수 있다.
Alamouti, Cylic delay diversity(CCD), Cylic shift diversity(CSD), Space-frequency block code(SFBC), Space-time block code(STBC)-
Patent Agency Ranking
公开(公告)号：KR1020080040105A
公开(公告)日：2008-05-08
申请号：KR1020060107639
申请日：2006-11-02
CPC classification number: H04B7/0452 , H04B7/0456
Abstract: A beam-based transmission apparatus and a method thereof are provided to increase sector throughput by increasing the number of ATs(Access Terminals) which participate in a multi-user MIMO(Multiple Input Multiple Output) system and optimize the MIMO system by increasing the number of terminals participating in the MIMO system. An AN(Access Node) estimates a spatial channel matrix, which is formed by its Rx antennas and the Tx antennas of ATs within its own coverage, and a channel rank(S100). An AT selection part selects an AT set within the coverage of the AN(S102). A precoding matrix selection part selects one among the combinations of the precoding matrix of the selected AT set and forms a new spatial channel matrix containing the selected precoding matrix(S104). Using the new spatial channel matrix, a performance estimation calculation part obtains an estimated performance value and stores it in a spatial channel matrix storage part. A control part compares the obtained estimated performance value with a previously stored estimated performance value and stores a better one in an optimum AT set storage part(S106). The control part judges whether a new spatial channel matrix has been formed for every precoding matrix combination(S108). If so, the control part judges whether performance estimation has been completed for the spatial channel matrixes of all the AT sets within the coverage of the AN(S110). If so, the control part executes scheduling using the optimum AT set which shows the optimum performance value stored in the optimum AT set storage part(S112).
Abstract translation: 提供了一种基于波束的传输设备及其方法，通过增加参与多用户MIMO（多输入多输出）系统的AT（接入终端）的数量来增加扇区吞吐量，并通过增加数量来优化MIMO系统 的终端参与MIMO系统。 AN（接入节点）估计由其Rx天线和其自身覆盖范围内的AT的Tx天线形成的空间信道矩阵和信道秩（S100）。 AT选择部分选择在AN的覆盖范围内的AT集（S102）。 预编码矩阵选择部分选择所选择的AT集合的预编码矩阵的组合之一，并形成包含所选择的预编码矩阵的新的空间信道矩阵（S104）。 使用新的空间信道矩阵，性能估计计算部分获得估计的性能值并将其存储在空间信道矩阵存储部分中。 控制部将所获得的估计性能值与先前存储的估计性能值进行比较，并将其更好地存储在最佳AT集合存储部中（S106）。 控制部分判断是否为每个预编码矩阵组合形成新的空间信道矩阵（S108）。 如果是，则控制部判定在AN的覆盖范围内的所有AT集合的空间信道矩阵的性能估计是否已经完成（S110）。 如果是，则控制部使用表示存储在最佳AT集合存储部中的最佳性能值的最佳AT集来执行调度（S112）。
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公开(公告)号：KR1020080030433A
公开(公告)日：2008-04-04
申请号：KR1020060119829
申请日：2006-11-30
CPC classification number: H04W52/42 , H04B7/0452 , H04B7/0465 , H04W52/243 , H04L27/3483 , Y02D70/00
Abstract: A preprocessing device in a multi-user MIMO(Multiple Input Multiple Output) communication system and a preprocessing method are provided to select a constellation rotational angle based on interference signals between users on a transmission end, thereby minimizing transmission power as improving performance even without deteriorating a structural gain of an existing multi-user MIMO preprocessing device. An interference signal substantial channel generator(140) extracts an interference signal to be applied to a transmission signal of the first user. A rotational angle selector(110) selects a rotational angle for rotating constellation of the transmission signal to be transmitted by the first user, by using the extracted interference signal and rotational angle number information. A modulo operator(120) controls transmission power by removing the interference signal from the transmission signal of the first user. A matrix multiplier(130) multiplies a Hermitian matrix by the transmission signal of the first user to generate a communication channel for sending the transmission signal of the first user to a receiving end(200) as the selected rotational angle.
Abstract translation: 提供多用户MIMO（多输入多输出）通信系统和预处理方法中的预处理装置，用于基于传输端的用户之间的干扰信号来选择星座旋转角度，由此尽可能降低传输功率，即使不降低性能也能提高性能 现有的多用户MIMO预处理装置的结构增益。 干扰信号实质信道发生器（140）提取要施加到第一用户的传输信号的干扰信号。 旋转角度选择器（110）通过使用提取的干涉信号和旋转角度数信息来选择用于旋转要由第一用户发送的发送信号的星座的旋转角度。 模运算器（120）通过从第一用户的发送信号中去除干扰信号来控制发送功率。 矩阵乘法器（130）将Hermitian矩阵乘以第一用户的发送信号，以生成用于将第一用户的发送信号发送到接收端（200）的通信信道作为所选择的旋转角度。
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公开(公告)号：KR100812352B1
公开(公告)日：2008-03-11
申请号：KR1020060124573
申请日：2006-12-08
CPC classification number: H04L27/2613 , H04L5/023 , H04L27/2662 , H04B7/2621 , H04W74/004
Abstract: An uplink control channel structure in a mobile wideband wireless access system and a method allocating the same are provided to improve a ranging performance and a detection performance by removing an ICI(Inter-Carrier interference) and ISI(Inter-Symbol Interference) generated by a conventional method. An uplink control channel structure in a mobile wideband wireless access system includes a first long cyclic prefix(110), an effective symbol(120), a second long cyclic prefix(210), and an effective symbol(220). The first long cyclic prefix prevents interference distortion of an initial ranging signal or a hand-over ranging signal. The effective symbol is located next to the long cyclic prefix in a time and transmits the initial ranging signal or the hand-over ranging signal. The second long cyclic prefix is located next to the effective symbol in a time. The second long cyclic prefix prevents interference distortion of the initial ranging signal or the hand-over ranging signal and a cyclic ranging signal or a band request ranging signal. The effective symbol is located next to the second long cyclic prefix in a time. The effective symbol transmits the cyclic ranging signal or the band request ranging signal.
Abstract translation: 提供了移动宽带无线接入系统中的上行链路控制信道结构及其分配方法，以通过去除由IMS产生的ICI（载波间干扰）和ISI（符号间干扰）来提高测距性能和检测性能。 常规方法。 移动宽带无线接入系统中的上行控制信道结构包括第一长循环前缀（110），有效符号（120），第二长循环前缀（210）和有效符号（220）。 第一个长循环前缀可防止初始测距信号或切换测距信号的干扰失真。 有效符号在一段时间内位于长循环前缀旁边，并发送初始测距信号或切换测距信号。 第二个长循环前缀位于有效符号的一个时间旁边。 第二长循环前缀防止初始测距信号或切换测距信号的干扰失真以及循环测距信号或频带请求测距信号。 有效符号在一个时间内位于第二个长循环前缀的旁边。 有效符号发送循环测距信号或频带请求测距信号。
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公开(公告)号：KR1020080003733A
公开(公告)日：2008-01-08
申请号：KR1020070066551
申请日：2007-07-03
Applicant: 한국전자통신연구원
CPC classification number: H04W72/0406 , H04B7/2606 , H04W16/26 , H04W84/047 , H04W72/1205
Abstract: An apparatus and a method for relaying between a base station and a mobile station, and a control information receiving method are provided to enable the base station to allocate dedicated resources to a relay station previously before control information is generated in the relay station, so that relay station can transmit the control information to the base station as minimizing time delay. In a relay method of a first relay station(200) for relaying between a mobile station(300) and a base station(100), the method comprises the following steps of: requesting the base station to allocate a resource required for transmitting control information about the mobile station to the base station if an event related to the mobile station is generated(S401,S407); and transmitting the control information to the base station through the resource if the control information about the mobile station is generated(S413).
Abstract translation: 提供了一种在基站和移动台之间进行中继的装置和方法以及控制信息接收方法，以使基站能够在中继站中先前产生控制信息之前，向中继站分配专用资源，使得 中继站可以将控制信息发送到基站，以最小化时间延迟。 在用于在移动台（300）和基站（100）之间中继的第一中继站（200）的中继方法中，该方法包括以下步骤：请求基站分配发送控制信息所需的资源 如果生成与移动站有关的事件，则关于移动站到基站（S401，S407）; 以及如果生成关于所述移动站的控制信息，则通过所述资源将所述控制信息发送到所述基站（S413）。
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公开(公告)号：KR100760998B1
公开(公告)日：2007-09-21
申请号：KR1020060095650
申请日：2006-09-29
Applicant: 한국전자통신연구원 , 연세대학교 산학협력단
CPC classification number: H04B7/0658 , H04B7/0634 , H04B7/0639
Abstract: A method and an apparatus for optimizing a codebook for a quantized precoder by using a steepest descent algorithm are provided to minimize the maximum correlation of the codebook by optimizing the codebook through the steepest descent algorithm, thereby improving the bit error performance of the codebook. A method for optimizing a codebook comprises the following steps of: selecting a codebook to optimize(S610); changing each code word into code words of which the correlation is minimized between the code words by applying a steepest descent algorithm to the each code word of the selected codebook(S620); determining whether codebook including the changed code words is optimized(S640); and storing the codebook when it is determined that the codebook is optimized(S650).
Abstract translation: 提供一种通过使用最陡下降算法来优化量化预编码器的码本的方法和装置，以通过最速下降算法优化码本来最小化码本的最大相关性，从而提高码本的位错误性能。 一种用于优化码本的方法包括以下步骤：选择要优化的码本（S610）; 通过对所选码本的每个码字应用最陡下降算法，将每个码字变换成代码字之间相关最小化的码字（S620）; 确定包括改变的代码字的码本是否被优化（S640）; 以及当确定码本被优化时存储码本（S650）。
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