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    Apparatus and method for generating satellite navigation signal based on software
    2.
    发明授权
    Apparatus and method for generating satellite navigation signal based on software 有权
    基于软件生成卫星导航信号的装置和方法

    公开(公告)号：US09383450B2

    公开(公告)日：2016-07-05

    申请号：US13679985

    申请日：2012-11-16

    Applicant: Electronics and Telecommunications Research Institute

    Inventor： Tae Hee Kim ,  Sang Uk Lee

    IPC: G01S19/23

    CPC classification number: G01S19/23

    Abstract: Provided is an apparatus and method for generating a satellite navigation signal, the method including: extracting, navigation data that is a parameter required to generate a navigation message; verifying visible satellites at a current position of a receiver based on a position of the receiver and positions of satellites calculated based on navigation data; calculating a pseudo distance from each visible satellite and a Doppler of each visible satellite; calculating, as a Doppler period, a duration of time corresponding to a Doppler displacement capable of being processed at the receiver; generating a navigation message frame to generate a satellite navigation signal, based on navigation data and a TOW; and generating a satellite navigation signal of a digitized IF for each visible satellite based on the navigation message frame, the pseudo distance for each visible satellite, and the Doppler for each visible satellite during the Doppler period.

    Abstract translation: 提供了一种用于生成卫星导航信号的装置和方法，所述方法包括：提取作为生成导航消息所需的参数的导航数据; 基于接收机的位置和基于导航数据计算的卫星的位置来验证接收机当前位置处的可见卫星; 从每个可见卫星和每个可见卫星的多普勒计算伪距离; 作为多普勒周期计算对应于能够在接收机处理的多普勒位移的持续时间; 基于导航数据和TOW生成导航消息帧以产生卫星导航信号; 以及在多普勒周期期间，基于导航消息帧，每个可见卫星的伪距离和每个可见卫星的多普勒，为每个可见卫星生成数字化IF的卫星导航信号。

    Hybrid direction identifying apparatus and method
    3.
    发明授权
    Hybrid direction identifying apparatus and method 有权
    混合方向识别装置和方法

    公开(公告)号：US09304182B2

    公开(公告)日：2016-04-05

    申请号：US13766004

    申请日：2013-02-13

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    Inventor： Jeom Hun Lee ,  In One Joo ,  Myung Soon Kim ,  Cheon Sig Sin ,  Sang Uk Lee

    IPC: G01S5/04 ,  G01S3/48 ,  G01S3/58 ,  G01S5/14

    CPC classification number: G01S3/48 ,  G01S3/58 ,  G01S5/04 ,  G01S5/14

    Abstract: A hybrid direction apparatus and method that rapidly and accurately detects a direction of a radio signal source based on a direction detecting scheme by comparing an amplitude or signal strength, a virtual Doppler scheme, a phase difference comparison scheme while removing an ambiguity based on an amplitude or signal strength scheme, and identify a direction relatively precisely based on a phase difference scheme using only two antennas. Also, an arrival direction of a relative radio wave when an arrival direction of a radio wave is vertical to a single rotating axis may be precisely identified by mounting a directional antenna and a phase comparison antenna on the single rotating axis, and rotating the two antennas.

    Abstract translation: 一种混合方向装置和方法，其通过比较幅度或信号强度，虚拟多普勒方案，相位差比较方案，基于方向检测方案快速准确地检测无线电信号源的方向，同时基于振幅消除模糊度 或信号强度方案，并且基于仅使用两个天线的相位差方案来相对精确地识别方向。 此外，通过在单个旋转轴上安装定向天线和相位比较天线，可以精确地识别当无线电波的到达方向垂直于单个旋转轴时的相对无线电波的到达方向，并且旋转两个天线 。

    System and method for detecting broadband global positioning system (GPS) jamming
    4.
    发明授权
    System and method for detecting broadband global positioning system (GPS) jamming 有权
    用于检测宽带全球定位系统（GPS）干扰的系统和方法

    公开(公告)号：US08958511B2

    公开(公告)日：2015-02-17

    申请号：US14024211

    申请日：2013-09-11

    Applicant: Electronics and Telecommunications Research Institute

    Inventor： In One Joo ,  Jeom Hun Lee ,  Cheon Sig Sin ,  Sang Uk Lee

    IPC: H04K3/00

    CPC classification number: H04K3/228 ,  H04K3/22 ,  H04K3/90

    Abstract: A system and method for detecting broadband global positioning system (GPS) jamming is provided, the system including a local oscillator maintainer to maintain a plurality of local oscillators, a frequency band selector to select a frequency band in which jamming is to be detected, in response to receipt of a radio frequency (RF) signal, an oscillating signal output unit to allow an oscillating signal to be output from a local oscillator identified based on the selected frequency band, among the plurality of local oscillators, and an intermediate frequency (IF) signal generator to generate an IF signal using the RF signal and the oscillating signal.

    Abstract translation: 提供了一种用于检测宽带全球定位系统（GPS）干扰的系统和方法，该系统包括本地振荡器维护器以维持多个本地振荡器，频带选择器选择要检测到干扰的频带， 响应于接收射频（RF）信号，振荡信号输出单元，以允许从多个本地振荡器中基于所选频带识别的本地振荡器输出振荡信号，以及中频（IF ）信号发生器，以使用RF信号和振荡信号来产生IF信号。

    Method and apparatus for removing spoofing signal in satellite navigation system
    5.
    发明授权
    Method and apparatus for removing spoofing signal in satellite navigation system 有权
    卫星导航系统中去除欺骗信号的方法和装置

    公开(公告)号：US09383449B2

    公开(公告)日：2016-07-05

    申请号：US14049697

    申请日：2013-10-09

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    Inventor： Tae Hee Kim ,  Sang Uk Lee

    IPC: G01S19/21 ,  G01S19/35

    CPC classification number: G01S19/215 ,  G01S19/35

    Abstract: Provided is a method and apparatus for removing a spoofing signal. The apparatus may convert a global positioning system (GPS) signal from an RF signal to an IF signal, and remove a spoofing signal based on whether the spoofing signal is present in the RF signal. The apparatus may obtain and track the spoofing signal using the IF signal, and generate a characteristic of the spoofing signal. The apparatus may generate an anti-spoofing signal by shifting a phase of the spoofing signal 180 degrees based on the characteristic of the spoofing signal.

    Abstract translation: 提供了一种去除欺骗信号的方法和装置。 该装置可以将全球定位系统（GPS）信号从RF信号转换为IF信号，并且基于欺骗信号是否存在于RF信号中去除欺骗信号。 该装置可以使用IF信号获取和跟踪欺骗信号，并产生欺骗信号的特征。 该装置可以基于欺骗信号的特性将欺骗信号的相位180度移位180度来产生防欺骗信号。

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