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    Signal receiving device for measuring characteristic of wireless communication channel, and method of measuring characteristic of wireless communication channel
    4.
    发明授权
    Signal receiving device for measuring characteristic of wireless communication channel, and method of measuring characteristic of wireless communication channel 有权
    用于测量无线通信信道特性的信号接收装置，以及测量无线通信信道特性的方法

    公开(公告)号：US09397870B2

    公开(公告)日：2016-07-19

    申请号：US14636728

    申请日：2015-03-03

    Applicant: Electronics and Telecommunications Research Institute

    Inventor： Heon Kook Kwon ,  Myung Don Kim ,  Kwangchun Lee ,  Young Jun Chong

    IPC: H04L25/06 ,  H04L27/22 ,  H04L1/20

    CPC classification number: H04L25/061 ,  H04J11/004 ,  H04J11/0066 ,  H04L1/206 ,  H04L25/0212 ,  H04L27/22 ,  H04L27/3863

    Abstract: A signal receiving device for measuring a characteristic of a wireless communication channel is provided. The signal receiving device includes an analog signal processor, an analog-digital converter, and a digital signal processor. The analog signal processor generates a band-limited signal by decreasing an intensity of a signal having an image frequency in a correlation operation result signal being a result of correlation operation, and generates an intermediate frequency signal by transforming the band-limited signal. The analog-digital converter converts the intermediate frequency signal into a digital signal. The digital signal processor generates a demodulated signal by performing in-phase/quadrature-phase modulation on the digital signal, the demodulated signal including a baseband signal, which includes a direct current component, and signals repeated at constant frequency intervals with a same bandwidth as the baseband signal, and generates an impulse response signal by decreasing intensities of the repeated signals in the demodulated signal.

    Abstract translation: 提供了一种用于测量无线通信信道的特性的信号接收装置。 信号接收装置包括模拟信号处理器，模拟数字转换器和数字信号处理器。 模拟信号处理器通过减小作为相关运算结果的相关运算结果信号中具有图像频率的信号的强度来产生频带限制信号，并且通过变换频带限制信号来产生中频信号。 模数转换器将中频信号转换为数字信号。 数字信号处理器通过对数字信号执行同相/正交相位调制来产生解调信号，该解调信号包括包括直流分量的基带信号和以恒定频率间隔以与 基带信号，并且通过降低解调信号中的重复信号的强度来产生脉冲响应信号。

    Apparatus and method for determining received signal level in ray-tracing wave propagation environment
    7.
    发明授权
    Apparatus and method for determining received signal level in ray-tracing wave propagation environment 有权
    用于确定光线跟踪波传播环境中的接收信号电平的装置和方法

    公开(公告)号：US09184859B2

    公开(公告)日：2015-11-10

    申请号：US13899244

    申请日：2013-05-21

    Applicant: Electronics and Telecommunications Research Institute

    Inventor： Myoung-Won Jung ,  Young Jun Chong ,  Jong Ho Kim

    IPC: H04B17/00 ,  H04B17/318

    CPC classification number: H04B17/318

    Abstract: An apparatus for determining a received signal level of a radio wave in a ray-tracing wave propagation environment includes a reception unit configured to receive the radio wave; and an analyzing unit configured to determine the received signal level of the radio wave in the ray-tracing wave propagation environment. Further, the analyzing unit is configured to analyze a correlation of the height and altitude of a surface roughness that recognizes the surface of a surrounding obstacle depending on the length of wavelength in the course of delivery of a received signal of the radio wave and analyze precisely the scattering of the received signal depending on the surface roughness to determine the received signal level of the radio wave when determining the received signal level.

    Abstract translation: 一种用于确定射线跟踪波传播环境中的无线电波的接收信号电平的装置，包括接收无线电波的接收单元; 以及分析单元，被配置为确定所述射线跟踪波传播环境中的所述无线电波的接收信号电平。 此外，分析单元被配置为根据无线电波的接收信号的传送过程中的波长长度来分析识别周围障碍物的表面的表面粗糙度的高度和高度的相关性，并且精确地分析 接收信号的散射取决于表面粗糙度，以在确定接收信号电平时确定无线电波的接收信号电平。

    Backward-wave oscillator in communication system
    8.
    发明授权
    Backward-wave oscillator in communication system 有权
    通信系统中的后向波振荡器

    公开(公告)号：US09111714B2

    公开(公告)日：2015-08-18

    申请号：US14475802

    申请日：2014-09-03

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    Inventor： Ju Yeon Hong ,  Young Jun Chong ,  Jeong Hae Lee ,  Dong Jin Kim

    IPC: H03B9/08 ,  H01J25/46 ,  H01J23/24

    CPC classification number: H01J25/46 ,  H01J23/24 ,  H01J25/40

    Abstract: Provided is a backward-wave oscillator in a communication system, including a waveguide formed of a metamaterial. A unit structure of the waveguide may include: a top plate; a short-circuited stub; a bottom plate separated at a predetermined gap from the top plate, and having the short-circuited stub formed in the center thereof; a first metal pillar connecting the top plate at a first port positioned on one surface based on the short-circuited stub to the bottom plate at a second port positioned on the opposite surface of the first port based on the short-circuited stub; and a second metal pillar separated from the first metal pillar, and connecting the top plate at the second port to the bottom plate at the first port.

    Abstract translation: 提供了一种通信系统中的反向波振荡器，包括由超材料形成的波导。 波导的单元结构可以包括：顶板; 短路短路 与顶板隔开预定间隙的底板，其中心形成短路短截线; 第一金属支柱，其基于所述短路短截线将位于一个表面上的第一端口连接到位于所述第一端口的相对表面上的第二端口处的所述底板，所述第二端口基于所述短路短截线; 以及与第一金属柱分离的第二金属柱，并且将第二端口处的顶板连接到第一端口处的底板。

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