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    Communication method of terminal and communication method of base station for direct communication link between terminals
    6.
    发明授权
    Communication method of terminal and communication method of base station for direct communication link between terminals 有权
    终端通信方式和终端之间直接通信链路的基站通信方式

    公开(公告)号：US09433024B2

    公开(公告)日：2016-08-30

    申请号：US13944390

    申请日：2013-07-17

    Applicant: Electronics and Telecommunications Research Institute

    Inventor： Anseok Lee ,  Eunkyung Kim ,  Wooram Shin ,  Jae Sun Cha ,  Kwang Jae Lim

    IPC: H04W76/02

    CPC classification number: H04W76/14

    Abstract: A communication method of a terminal and a communication method of a base station for a direct communication link between terminals are disclosed. A base station schedules a reference terminal to transmit a ranging code, and schedules target terminals to receive the ranging code. The reference terminal measures the ranging code received from the target terminals, and transmits a ranging code measurement result to the base station. The base station selects a terminal from among the target terminals to form the direct communication link with the reference terminal among the target terminals based on the ranging code measurement result.

    Abstract translation: 公开了一种用于终端之间的直接通信链路的终端的通信方法和基站的通信方法。 基站调度参考终端来发送测距码，并且调度目标终端以接收测距码。 参考终端测量从目标终端接收的测距码，并将测距码测量结果发送到基站。 基站从目标终端中选择终端，基于测距码测量结果，与目标终端之间的基准终端形成直接通信链路。

    Method of frequency synchronization in distributed network
    7.
    发明授权
    Method of frequency synchronization in distributed network 有权
    分布式网络中频率同步的方法

    公开(公告)号：US09209959B2

    公开(公告)日：2015-12-08

    申请号：US13851082

    申请日：2013-03-26

    Applicant: Electronics and Telecommunications Research Institute

    Inventor： Jung Hyun Kim ,  Jihyung Kim ,  Hyun-jae Kim ,  Kwang Jae Lim ,  DongSeung Kwon

    IPC: H04W56/00 ,  H04W4/08 ,  H04L7/00 ,  H04L27/00 ,  H04L27/26 ,  H04J3/06

    CPC classification number: H04L7/0016 ,  H04L27/0014 ,  H04L27/2657 ,  H04L27/2675 ,  H04L2027/0065 ,  H04L2027/0095 ,  H04W56/0035

    Abstract: A method and apparatus for synchronizing a carrier frequency of a node included in a distributed network are provided. The apparatus includes a frequency offset estimating unit, an offset average value calculating unit, and a frequency adjustment value calculating unit. The method includes receiving preambles from a plurality of nodes adjacent to the node, estimating offsets of the carrier frequencies from the received preambles for each of the plurality of neighbor nodes, calculating an average value of the estimated offsets, calculating an adjustment value of the carrier frequencies with respect to the entirety of the plurality of neighbor nodes by using the average value, and adjusting a carrier frequency of the node on the basis of the adjustment value.

    Abstract translation: 提供了一种用于使包含在分布式网络中的节点的载波频率同步的方法和装置。 该装置包括频率偏移估计单元，偏移平均值计算单元和频率调整值计算单元。 该方法包括从邻近该节点的多个节点接收前导码，从多个相邻节点中的每一个的接收到的前同步码估计载波频率的偏移，计算估计的偏移的平均值，计算载波的调整值 通过使用平均值对多个相邻节点的整体进行频率的调整，并且基于调整值来调整节点的载波频率。

    Precoding method and apparatus
    9.
    发明授权
    Precoding method and apparatus 有权
    预编码方法和装置

    公开(公告)号：US09031149B2

    公开(公告)日：2015-05-12

    申请号：US14104540

    申请日：2013-12-12

    Applicant: Electronics and Telecommunications Research Institute

    Inventor： In Sook Park ,  Kwang Jae Lim ,  DongSeung Kwon

    IPC: H04L1/02 ,  H04L27/28 ,  H04B7/04 ,  H04L25/03 ,  H04B7/06

    CPC classification number: H04B7/0456 ,  H04B7/0417 ,  H04B7/0626 ,  H04L25/0391

    Abstract: A transmit node receives a transformed correlation matrix or a correlation matrix of a channel coefficient matrix, or a correlation matrix of an interference channel coefficient matrix from each of receive nodes sharing a radio resource. The transmit node determines a precoder based on a value maximizing values determined by the transformed correlation matrix or the correlation matrix of the channel coefficient matrix, or a value minimizing values determined by the correlation matrix of the interference channel coefficient matrix, and precodes a transmit signal by using the determined precoder.

    Abstract translation: 发送节点接收来自共享无线资源的每个接收节点的信道系数矩阵或干扰信道系数矩阵的相关矩阵的变换相关矩阵或相关矩阵。 发送节点基于由变换的相关矩阵或信道系数矩阵的相关矩阵确定的值最大化的值或者由干扰信道系数矩阵的相关矩阵确定的最小化值的值来确定预编码器，并且将发送信号 通过使用确定的预编码器。

    Method and apparatus for determining location information of signal source using unmanned aerial vehicle
    10.
    发明授权
    Method and apparatus for determining location information of signal source using unmanned aerial vehicle 有权

    公开(公告)号：US11492109B2

    公开(公告)日：2022-11-08

    申请号：US16403298

    申请日：2019-05-03

    Applicant: Electronics and Telecommunications Research Institute

    Inventor： Kwang Jae Lim

    IPC: G05D1/10 ,  B64C39/02 ,  H04B1/08 ,  H04W4/029 ,  H04B1/10

    Abstract: Disclosed is a method of determining location information of a signal source. A method of determining location information of a signal source by using an unmanned aerial vehicle according to an embodiment of the present disclosure includes determining, at a first location, first location information and first posture information of the unmanned aerial vehicle provided with a linear array antenna; determining, at the first location, a first measurement azimuth between the signal source and the linear array antenna; determining, at least one second location, at least one second location information and at least one second posture information of the unmanned aerial vehicle having the linear array antenna; determining, at the at least one second location, at least one second measurement azimuth between the signal source and the linear array antenna; and predicting the location information of the signal source using the information described above.

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