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21.发明公开다중안테나 시변 간섭채널 환경에서 협력 빔 형성 시스템을 위한 적응적 빔 형성방법 및 파일럿 듀레이션 또는 채널 피드백 듀레이션 선택방법 失效自适应光束跟踪方法和引导时间或通道反馈持续时间适应协调的波束形成系统
公开(公告)号：KR1020120078886A
公开(公告)日：2012-07-11
申请号：KR1020110000181
申请日：2011-01-03
Applicant: 한국과학기술원
IPC: H04B7/04
CPC classification number: H04B7/0617 , H04B7/024 , H04B7/0421
Abstract: PURPOSE: An adaptive beam forming method for cooperative beam forming system and a pilot duration/channel feedback duration selecting method are provided to minimize complexity of a cooperative beam forming system in a time variable channel environment. CONSTITUTION: A beam forming condition is obtained through an SVD(Singular Value Decomposition). A channel is obtained by using a beam forming matrix. The variation of the beam forming matrix is calculated through the variation of a channel. If the variation of the channel is delta HK(n), the channel is calculated when time is n.
Abstract translation: 目的：提供一种用于协同波束形成系统和导频持续时间/信道反馈持续时间选择方法的自适应波束形成方法，以便在时间可变信道环境中最小化协同波束形成系统的复杂度。 构成：通过SVD（奇异值分解）获得波束形成条件。 通过使用波束形成矩阵获得通道。 通过通道的变化来计算波束形成矩阵的变化。 如果通道的变化为ΔHIN（n），则当时间为n时计算通道。
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公开(公告)号：KR1020120078258A
公开(公告)日：2012-07-10
申请号：KR1020100140497
申请日：2010-12-31
Applicant: 한국과학기술원
IPC: H04B7/04
CPC classification number: H04B7/0617 , H04B7/043
Abstract: PURPOSE: An adaptive beam design method and an access method are provided to generate a new beam vector based on information about a current channel and a previously calculated beam vector. CONSTITUTION: A cohesion coefficient matrixes Akl is updated(S10). The size of a matrix consists of a channel matrix Hk1 and a liner combination coefficient matrix Akl(S30). An eigen vector is extracted through a matrix(S40). The eigen vector of the smallest R is extracted by using an algorithm 1(S50). Time(n) is varied(S60).
Abstract translation: 目的：提供自适应波束设计方法和访问方法，以基于关于当前信道和先前计算的波束矢量的信息来生成新的波束矢量。 构成：更新内聚系数矩阵Ak1（S10）。 矩阵的大小由通道矩阵Hk1和衬垫组合系数矩阵Ak1组成（S30）。 通过矩阵提取特征向量（S40）。 通过使用算法1提取最小R的特征向量（S50）。 时间（n）是变化的（S60）。
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公开(公告)号：KR1020110045649A
公开(公告)日：2011-05-04
申请号：KR1020090102306
申请日：2009-10-27
IPC: H04B7/02
CPC classification number: H04B7/02
Abstract: PURPOSE: A transmission apparatus and method for performing interference alignment thereof, and a reception apparatus and method for operating the same are provided to generate a beam-forming matrix for adaptively arranging interference by using repeated minimum square method in an MIMO time variable interference channel. CONSTITUTION: A beam-forming matrix generating unit(214) generates a correlation coefficient for arranging beam-forming, the entire channel information corresponding to an interference channel environment and an optimized beam-forming matrix for interference arrangement by using the beam-forming matrix. A transmission unit(218) performs beam-forming for a signal by using the generated optimized beam-forming matrix. The transmission unit transmits the beam-formed signal to at least one reception device, and the beam-forming matrix generating unit generates an optimized beam-forming matrix through the repeated calculation for re-calculating the correlation coefficient by using the calculated beam-forming matrix.
Abstract translation: 目的：一种用于执行其干扰对准的传输装置和方法，以及用于操作该接收装置和方法的接收装置和方法，用于通过使用MIMO时间可变干扰信道中的重复最小二乘法来生成用于自适应地布置干扰的波束形成矩阵。 构成：波束形成矩阵生成单元（214）通过使用波束形成矩阵产生用于布置波束形成，与干扰信道环境对应的整个信道信息和用于干扰布置的优化波束形成矩阵的相关系数。 传输单元（218）通过使用所生成的优化波束形成矩阵来执行信号的波束形成。 发送单元将波束形成信号发送到至少一个接收装置，并且波束形成矩阵生成单元通过重复计算生成优化的波束形成矩阵，以通过使用计算的波束形成矩阵来重新计算相关系数 。
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公开(公告)号：KR1020100097942A
公开(公告)日：2010-09-06
申请号：KR1020090016841
申请日：2009-02-27
Applicant: 한국과학기술원
CPC classification number: H04W88/08 , H04W16/32 , H04W36/30 , H04W48/20 , H04W84/045
Abstract: PURPOSE: An apparatus and a method for accessing a radio network using a beam scanning scheme are provided to add or remove a femto base station to and from a wireless network easily. CONSTITUTION: An antenna unit(410) includes plural transmission and reception antennas, and a gain control unit(420) controls the maximum gain direction of the antenna unit. A reception unit(430) receives a pilot signal from at least one base station(460,470,480) through a gain-controlled antenna unit. A priority calculator(440) calculates an access priority for the base stations which receives a pilot signal, and an access unit(450) accesses at least one base station among the base stations based on the access priority.
Abstract translation: 目的：提供使用波束扫描方案来访问无线电网络的装置和方法，以便容易地向毫微微基站和从无线网络移除毫微微基站。 构成：天线单元（410）包括多个发送和接收天线，并且增益控制单元（420）控制天线单元的最大增益方向。 接收单元（430）通过增益控制的天线单元从至少一个基站（460,470,480）接收导频信号。 优先级计算器（440）计算接收导频信号的基站的接入优先级，并且接入单元（450）基于接入优先级访问基站中的至少一个基站。
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公开(公告)号：KR1020100028696A
公开(公告)日：2010-03-15
申请号：KR1020080087543
申请日：2008-09-05
Applicant: 한국과학기술원
CPC classification number: H04L12/2859 , H04B1/713 , H04L5/0007 , H04W64/00
Abstract: PURPOSE: A point-to-point communication method based on an OFDMA is provided to minimize power consumption of a terminal by performing the point-to-point communication between a transmission terminal and a reception terminal. CONSTITUTION: A base station determines the position of a reception terminal by receiving communication request information from a transmission terminal(S10). A distance between the transmission terminal and the reception terminal are compared with the preset range. The point-to-point OFDMA information including a subcarrier hoping sequence for the point-to-point communication is transmitted to the transmission terminal and the reception terminal(S20). The point-to-point communication is performed according to the received OFDMA information(S30).
Abstract translation: 目的：提供一种基于OFDMA的点到点通信方法，通过执行发送终端和接收终端之间的点对点通信来最小化终端的功耗。 构成：基站通过从发送终端接收通信请求信息来确定接收终端的位置（S10）。 将发送终端与接收终端之间的距离与预设范围进行比较。 包括用于点对点通信的子载波希望序列的点对点OFDMA信息被发送到发送终端和接收终端（S20）。 根据接收到的OFDMA信息进行点对点通信（S30）。
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Patent Agency Ranking
公开(公告)号：KR1020090032544A
公开(公告)日：2009-04-01
申请号：KR1020070097875
申请日：2007-09-28
Applicant: 한국과학기술원
IPC: H04B7/26
CPC classification number: H04W84/047 , H04W16/28 , H04W92/12 , H04W16/02
Abstract: A network configuration method and a transmission frequency selection method in a future wireless communication system are provided to effectively use wireless resources of a microwave frequency band for link communications between a base station and a base station controller in an external network and base stations to replace the communication with wireless communication, thereby drastically reducing infra construction costs. An access point determines a communication target(S41). If the communication target is a user terminal, the access point determines whether a visible channel is secured(S43). When capacity of a network tries is expanded, a disapproved band of 60~70 GHz is allocated(S44, S45).
Abstract translation: 提供将来的无线通信系统中的网络配置方法和发送频率选择方法，以有效地利用微波频带的无线资源用于外部网络和基站中的基站与基站控制器之间的链路通信，以代替 与无线通信的通信，从而大大降低了建设成本。 接入点确定通信目标（S41）。 如果通信对象是用户终端，则接入点确定是否保护可见信道（S43）。 当网络容量尝试扩展时，分配60〜70 GHz的被拒绝频带（S44，S45）。
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公开(公告)号：KR101708297B1
公开(公告)日：2017-02-28
申请号：KR1020090102306
申请日：2009-10-27
IPC: H04B7/02
Abstract: 송신장치및 그의간섭정렬방법, 그리고, 수신장치및 그의동작방법이제공된다. 송신장치는수신장치들중 적어도하나로부터전체채널정보또는누적된채널변화량을수신할수 있다. 각수신장치는누적된채널변화량이기준값보다크면추정된전체채널정보를송신장치에게피드백하며, 기준값보다작으면누적된채널변화량을송신장치에게피드백할수 있다. 송신장치는수신된전체채널정보또는누적된채널변화량중 하나와전송빔을이용하여빔포밍행렬을생성할수 있다.
Abstract translation: 发送装置及其干扰对齐方法，以及接收装置及其操作方法。 发送装置可以从至少一个接收装置接收全部信道信息或累积信道变化量。 每个接收装置，并反馈整个堆叠信道变化大于参考值时，估计的信道信息发送到发送装置，它可以比的累积反馈信道改变到所述发送装置的基准值小。 发送设备可以使用接收到的总信道信息或累积信道变化量和发送波束之一来生成波束成形矩阵。
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公开(公告)号：KR101412760B1
公开(公告)日：2014-07-04
申请号：KR1020070114996
申请日：2007-11-12
IPC: H04B7/26
CPC classification number: H04W52/325 , H04B17/336 , H04W52/223
Abstract: 파일럿 신호 전력 제어 장치가 개시된다. 파일럿 신호 전력 제어 장치는 채널 추정 오류로 인해 제1 순위 사용자에게 발생하는 잡음 증가량 또는 제2 순위 사용자가 제1 네트워크의 파일럿 신호를 검파(sensing)할 수 있는 확률인 검파 확률 중 적어도 하나를 예측하는 예측부, 예측된 상기 잡음 증가량 또는 상기 검파 확률 중 적어도 하나를 고려하여 상기 제1 순위 사용자의 채널 용량을 계산하는 채널 용량 계산부 및 계산된 상기 채널 용량을 이용하여 상기 파일럿 신호의 전력 레벨을 결정하는 전력 레벨 결정부를 포함한다.
인지 무선, 검파 확률, 채널 추정 오류, 채널 용량, 파일럿 신호-
29.发明授权다중안테나 시변 간섭채널 환경에서 협력 빔 형성 시스템을 위한 적응적 빔 형성방법 및 파일럿 듀레이션 또는 채널 피드백 듀레이션 선택방법 失效自适应波束跟踪方法和导频持续时间或信道反馈持续时间适应协调波束成形系统
公开(公告)号：KR101199439B1
公开(公告)日：2012-11-09
申请号：KR1020110000181
申请日：2011-01-03
Applicant: 한국과학기술원
IPC: H04B7/04
Abstract: 본 발명은, 여러 사용자가 존재하는 다중입력 다중출력(Multi Input Multi Output : MIMO) 시변 간섭채널(Time varying interference channel) 환경에서 협력 빔 형성(Coordinated beamforming) 기법을 위한 적응적 빔 형성 기법에 대한 송신 알고리즘 및 단말의 속도에 따른 파일럿 듀레이션 적용(pilot duration adaptation) 기법에 관한 것으로, 본 발명에 따르면, 채널이 변할 때마다 SVD 기법을 이용하여 매번 빔 형성 행렬을 다시 계산해 주어야 하므로 매우 큰 복잡도를 필요로 했던 종래기술의 문제점을 해결하여, 행렬의 곱셈만으로도 채널의 변화를 따라가는 적응적 빔 형성 기법이 제공됨으로써 실제 차세대 이동통신 시스템의 송신단을 구성하는 데에 핵심기술로 사용될 수 있고, 또한, 단말 그룹의 속도정보에 따라서 기지국에서 파일럿 듀레이션(pilot duration) 또는 채널 피드백 듀레이션(channel feedback duration)을 적절히 결정해 주는 기법이 제공됨으로써 주어진 자원을 가지고 최대의 시스템 성능을 낼 수 있다.
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公开(公告)号：KR1020110051522A
公开(公告)日：2011-05-18
申请号：KR1020090108145
申请日：2009-11-10
Applicant: 한국과학기술원
CPC classification number: H04B7/0617 , H04L25/03254 , H04W16/28
Abstract: PURPOSE: An adaptive interference alignment method for time-variable multiuser MIMO interference channels is provided to estimate the channel of an uplink based on an estimated channel. CONSTITUTION: A first DL(DownLink) channel is estimated, and a repeated least square method is used to calculate a beam forming vector. When the channel does not vary much, an intrinsic value, an intrinsic vector and a new beam-forming vector are calculated through the first DL channel. If the channel varies much, a new beam-forming vector is acquired based on a predicted channel.
Abstract translation: 目的：提供一种用于时变多用户MIMO干扰信道的自适应干扰对准方法，用于基于估计的信道估计上行链路的信道。 构成：估计第一个DL（下行链路）信道，并使用重复的最小二乘法来计算波束形成向量。 当通道不变化很大时，通过第一DL通道计算本征值，固有矢量和新的波束形成矢量。 如果信道变化很大，则基于预测信道获取新的波束形成向量。
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