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    GNSS anti-jamming using interference cancellation
    1.
    发明授权
    GNSS anti-jamming using interference cancellation 有权

    公开(公告)号：US11982751B2

    公开(公告)日：2024-05-14

    申请号：US17144400

    申请日：2021-01-08

    Applicant: Honeywell International Inc.

    Inventor： Mohandas Amarnathan

    IPC: G01S19/21 ,  H04B1/10 ,  H04K3/00

    CPC classification number: G01S19/21 ,  H04B1/1027 ,  H04B1/109 ,  H04K3/228 ,  H04K3/90

    Abstract: Systems and methods for GNSS anti-jamming using interference cancellation are described herein. In certain embodiments, a system includes an antenna that receives signals, wherein the signals comprise a weak portion associated with one or more GNSS satellites and a strong interference portion from an interfering signal source. The system also includes a GNSS anti-jammer. The GNSS anti-jammer includes an interference isolator that receives the received signals and provides an estimated strong interference portion as an output. The GNSS anti-jammer also includes a summer that subtracts the estimated strong interference portion from the received signals to create a summed signal. Further, the GNSS anti-jammer includes a local noise remover that removes noise generated by the interference isolator from the summed signal, wherein the local noise remover is a processor that digitally removes the noise. Further, the system includes a GNSS receiver coupled to receive the summed signal from the processor.

    Signal detection in the presence of a jamming signal
    4.
    发明授权
    Signal detection in the presence of a jamming signal 有权
    在存在干扰信号的情况下进行信号检测

    公开(公告)号：US09467247B2

    公开(公告)日：2016-10-11

    申请号：US14405475

    申请日：2013-06-25

    Applicant: ST-Ericsson SA

    Inventor： Gerald Whitworth

    IPC: H04K3/00 ,  G01S19/21 ,  H04B1/16

    CPC classification number: H04K3/42 ,  G01S19/21 ,  H04B1/16 ,  H04K3/228 ,  H04K3/45 ,  H04K3/822

    Abstract: A signal is detected and an unwanted jamming signal is removed from the detected signal. Respective first, second and third correlations between a received signal and signals at first, second and third frequencies are determined over a plurality of taps. The second frequency is higher than the first frequency and lower than the third frequency, and is equally spaced from the first and third frequencies. The second frequency is adapted to a frequency of the received signal such that peaks in the first and third correlations after corresponding adaptation of the first and third frequencies have substantially equal magnitudes. A difference is determined between non-peak magnitudes of the first and third correlations; and at least one of the correlations is compensated for the effects of the jamming signal, based on said difference.

    Abstract translation: 检测到信号，并从检测到的信号中去除不需要的干扰信号。 在多个抽头上确定接收信号和第一，第二和第三频率之间的信号之间的相应的第一，第二和第三相关。 第二频率高于第一频率且低于第三频率，并且与第一和第三频率相等。 第二频率适应于接收信号的频率，使得在第一和第三频率的对应适应之后的第一和第三相关中的峰值具有基本相等的幅度。 在第一和第三相关的非峰值幅度之间确定差异; 并且基于所述差异，对所述干扰信号的影响补偿所述相关性中的至少一个。

    DETECTING AND REMOVING SPOOFING SIGNALS
    6.
    发明申请
    DETECTING AND REMOVING SPOOFING SIGNALS 有权
    检测和删除信号

    公开(公告)号：US20160146944A1

    公开(公告)日：2016-05-26

    申请号：US14551646

    申请日：2014-11-24

    Applicant: The Boeing Company

    Inventor： William Preston Geren ,  Anthony Goodson

    IPC: G01S19/21

    CPC classification number: G01S19/215 ,  H04K3/228 ,  H04K3/65 ,  H04K3/90 ,  H04K2203/32

    Abstract: A method for detecting and removing spoofing signals may include receiving, by a navigation or communications device, a radio frequency (RF) signal and performing an anti-spoofing assessment to detect a presence of a spoofing signal associated with the RF signal. The method may additionally include generating a replica of the spoofing signal in response to the spoofing signal being detected and subtracting the replica of the spoofing signal from the RF signal to provide a residual non-spoofed signal. The method may further include decoding the residual non-spoofed signal by the navigation or communications device.

    Abstract translation: 用于检测和去除欺骗信号的方法可以包括由导航或通信设备接收射频（RF）信号并执行防欺骗评估以检测与RF信号相关联的欺骗信号的存在。 该方法可以另外包括响应于被检测的欺骗信号而生成欺骗信号的副本，并从RF信号中减去欺骗信号的副本以提供残留的非欺骗信号。 该方法还可以包括通过导航或通信设备解码残留的非欺骗信号。

    GEOLOCATION DEVICE
    7.
    发明申请
    GEOLOCATION DEVICE 审中-公开
    地球物理设备

    公开(公告)号：US20160025857A1

    公开(公告)日：2016-01-28

    申请号：US14809011

    申请日：2015-07-24

    Applicant: THALES

    Inventor： Bruno MONTAGNE ,  Franck LETESTU

    IPC: G01S19/01 ,  G01S19/21

    CPC classification number: G01S19/015 ,  G01S19/215 ,  H04K3/228 ,  H04K3/28 ,  H04K3/42 ,  H04K3/45 ,  H04K3/65 ,  H04K3/90

    Abstract: A geolocation device is disclosed. In one aspect, the geolocation device is adapted for receiving first radioelectric positioning signals from satellites. Each first signal has a first frequency and is generated from a first code specific to the satellite, from which stems the first signal. The device includes a first antenna configured to receive a geolocation signal, and a processing unit configured to determine a piece of positioning information of the device according to the geolocation signal which the first antenna is configured to receive. The device also includes a second antenna configured to emit at least one second signal, each second signal either being an emitted jamming signal, or an emitted spoofing signal and having a jamming or spoofing frequency spectrum including at least one of the first frequencies.

    Abstract translation: 公开了一种地理定位装置。 在一个方面，地理定位装置适于从卫星接收第一无线电定位信号。 每个第一信号具有第一频率，并且是从卫星特有的第一码产生的，从该第一码产生第一信号。 该设备包括被配置为接收地理定位信号的第一天线以及被配置为根据第一天线被配置为接收的地理位置信号来确定设备的一条定位信息的处理单元。 该设备还包括配置成发射至少一个第二信号的第二天线，每个第二信号是发射的干扰信号或发射的欺骗信号，并且具有包括第一频率中的至少一个的干扰或欺骗频谱。

    Magnetic stripe reader tamper protection
    8.
    发明授权
    Magnetic stripe reader tamper protection 有权
    磁条阅读器防篡改

    公开(公告)号：US09203546B1

    公开(公告)日：2015-12-01

    申请号：US14296310

    申请日：2014-06-04

    Applicant: Square, Inc.

    Inventor： Jeremy Wade ,  Max Joseph Guise

    IPC: G06K5/00 ,  G06K7/08 ,  H04K3/00

    CPC classification number: G06Q20/34 ,  G06F21/6245 ,  G06F21/64 ,  G06F21/86 ,  G06K7/084 ,  G06K7/087 ,  G06K19/07372 ,  G11B5/00808 ,  H04K1/02 ,  H04K3/228 ,  H04K3/42 ,  H04K3/43 ,  H04K3/825 ,  H04K2203/20 ,  H04L63/0245 ,  H04L63/14

    Abstract: A technique for tamper protection of incoming data signal to an electronic device is disclosed. An intentional interference signal is generated and modulated onto the incoming data signal as one composite input signal, to prevent unauthorized acquisition of valid data from the incoming data signal. The magnitude of the interference signal is adjusted to correspond to the magnitude of the incoming data signal, thereby preventing an attacker from properly differentiating the two different signals and/or decoding the valid data from the composite input signal. Once the composite input signal is safely received within the device, the interference signal can be filtered out in either analog mode or digital mode.

    Abstract translation: 公开了一种用于将输入数据信号篡改保护到电子设备的技术。 生成有意的干扰信号并将其调制到输入数据信号上作为一个复合输入信号，以防止来自输入数据信号的非法获取有效数据。 调整干扰信号的幅度以对应于输入数据信号的大小，从而防止攻击者将两个不同信号正确区分和/或从合成输入信号中解码有效数据。 一旦复合输入信号被安全地接收在设备内，干扰信号可以在模拟模式或数字模式中滤除。

    GNSS receiver autonomous signal authentication using signal stability analysis system and related method
    9.
    发明授权
    GNSS receiver autonomous signal authentication using signal stability analysis system and related method 有权
    GNSS接收机自动信号认证采用信号稳定性分析系统及相关方法

    公开(公告)号：US09094392B1

    公开(公告)日：2015-07-28

    申请号：US14065054

    申请日：2013-10-28

    Applicant: Patrick Y. Hwang

    Inventor： Patrick Y. Hwang

    IPC: H04L29/06

    CPC classification number: G01S19/215 ,  H04K3/228 ,  H04K3/65 ,  H04K3/90

    Abstract: A system and method are disclosed for autonomous authentication of a received signal based on characteristics of the signal. The method receives, acquires and tracks a signal to first determine if a carrier clock phase variable associated with the signal meets a phase consistency threshold. If so, the signal is labeled authentic and configured for output to a positioning system. Second and optionally, the system may determine if a data set measurement associated with a unique satellite identification of the signal meets a data set threshold. If not, the signal is labeled as inconsistent and discarded. The system and method continuously monitors the signal for consistency as well as authenticity based on the data set threshold and the phase consistency threshold. Should any tracked signal fall below either threshold, the signal is discarded from the possible positioning solution.

    Abstract translation: 公开了一种基于信号的特性来自动认证接收信号的系统和方法。 该方法接收，获取和跟踪信号，以首先确定与信号相关联的载波时钟相位变量是否满足相位一致性阈值。 如果是这样，信号被标记为真实的并被配置为输出到定位系统。 第二并且可选地，系统可以确定与信号的唯一卫星标识相关联的数据集测量是否满足数据集阈值。 如果没有，信号被标记为不一致并丢弃。 系统和方法基于数​​据集阈值和相位一致性阈值，连续监视信号的一致性和真实性。 如果任何跟踪的信号低于任一阈值，信号将从可能的定位解决方案中丢弃。

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