Dual-element microstrip patch antenna for mitigating radio frequency interference
    1.
    发明授权
    Dual-element microstrip patch antenna for mitigating radio frequency interference 失效
    双元件微带贴片天线,用于减轻射频干扰

    公开(公告)号:US06930639B2

    公开(公告)日:2005-08-16

    申请号:US10390331

    申请日:2003-03-14

    摘要: Method and apparatus for reducing radio frequency interference (RFI) using a dual-element patch antenna [10]. The antenna possesses two antenna elements [13, 14] having distinct radiation patterns. Either element may be independently selected using a DC bias voltage. Diodes [20] connected to the elements serve to disable one element when the other is selected. In one selected mode, a nominal radiation pattern provides a broad, hemispherical shaped sensitivity that is designed for acquiring and tracking all navigation satellites above the horizon. This nominal radiation pattern, however, is susceptible to interference that is present near or below the horizon. The second selectable radiation pattern of the dual-element antenna has comparatively higher gain toward zenith, and lower gain at and below the horizon to mitigate interference. This combination of features is packaged in a single antenna unit that can be a direct replacement for existing antennas. The dual-element antenna unit has a low vertical profile and is suitable for mounting on high-speed moving vehicles.

    摘要翻译: 使用双元件贴片天线降低射频干扰(RFI)的方法和装置[10]。 天线具有两个具有不同辐射图案的天线元件[13,14]。 可以使用DC偏置电压独立地选择任一元件。 连接到元件的二极管[20]用于在选择另一个元件时禁用一个元件。 在一种选择的模式中,标称辐射图形提供广泛的半球形灵敏度,其设计用于获取和跟踪地平线以上的所有导航卫星。 然而,这种标称辐射模式易于存在于地平线附近或之下的干扰。 双元件天线的第二种可选择的辐射图形具有相对较高的天顶增益,并且在水平线上和下方的增益较低以减轻干涉。 这种特征的组合被封装在单个天线单元中,其可以是现有天线的直接替代。 双元件天线单元具有低垂直轮廓,适合安装在高速移动车辆上。

    Geosecurity methods and devices using geotags derived from noisy location data from multiple sources
    2.
    发明授权
    Geosecurity methods and devices using geotags derived from noisy location data from multiple sources 有权
    使用从多个来源的嘈杂位置数据导出的地理标记的地质安全方法和设备

    公开(公告)号:US08315389B2

    公开(公告)日:2012-11-20

    申请号:US12657677

    申请日:2010-01-25

    IPC分类号: H04K1/00

    摘要: In a geo-security system, a device receives RF signals from multiple distinct classes of RF communication systems and extracts location-dependent signal parameters. A current geotag is computed from the parameters by fuzzy extractors involving quantization of the parameters and Reed-Solomon decoding to provide a reproducible unique geotag. The current geotag is compared with a stored geotag, and a geo-secured function of the device is executed based on the result of the comparison. The use of multiple signal sources of different types, combined with special fuzzy extractors provides a robust geotag that allows both lower false rejection rate and lower false acceptance rate.

    摘要翻译: 在地理安全系统中,设备从多个不同类别的RF通信系统接收RF信号,并提取位置相关的信号参数。 目前的地理标签是通过模糊提取器从参数中计算出来的,这些模糊提取器涉及量化参数和里德 - 所罗门解码,以提供可重现的唯一地理标记。 将当前的地理标签与存储的地理标签进行比较,并根据比较结果执行设备的地理安全功能。 使用不同类型的多个信号源,结合特殊的模糊提取器提供了一个强大的地理标记,允许较低的错误拒收率和较低的错误接受率。

    Arrangements for Location-Based Security Systems and Methods Therefor
    3.
    发明申请
    Arrangements for Location-Based Security Systems and Methods Therefor 审中-公开
    基于位置的安全系统及其方法的安排

    公开(公告)号:US20100278335A1

    公开(公告)日:2010-11-04

    申请号:US12263866

    申请日:2008-11-03

    IPC分类号: H04L9/08

    摘要: Aspects are applicable to secure encryption such as in the generation of a cryptographic key from location information as may be useful in portable/wireless communication devices. As an example, one embodiment is implemented as a method of generating cryptographic keys from location information derived from a signal received from a publicly-used wireless communication system. The location information is protected from fraudulently generated signals using direction of arrival of the received signal. The method attempts to verify that the direction of arrival corresponds to an expected direction of arrival for a received signal of the primary signal type, and in response to the direction of arrival being verified for the direction of arrival, and then enables use of an encryption key that is generated from positional information derived from the received signal

    摘要翻译: 方面适用于安全加密,例如从可能在便携式/无线通信设备中有用的位置信息产生加密密钥。 作为示例,一个实施例被实现为从从公共使用的无线通信系统接收的信号导出的位置信息生成加密密钥的方法。 使用所接收的信号的到达方向来保护位置信息不被欺诈地产生的信号。 该方法尝试验证到达方向对应于主信号类型的接收信号的预期到达方向,并且响应于到达方向被验证到达方向,然后使能加密 密钥,其是从从接收信号导出的位置信息产生的

    Arrangements for satellite-based navigation and methods therefor
    5.
    发明授权
    Arrangements for satellite-based navigation and methods therefor 失效
    卫星导航安排及方法

    公开(公告)号:US07868819B2

    公开(公告)日:2011-01-11

    申请号:US12205521

    申请日:2008-09-05

    IPC分类号: G01S1/00 H04B7/185

    CPC分类号: G01S19/21

    摘要: Various systems, methods and devices are implemented for processing received signals. Consistent with one such embodiment, a method is implemented for use in a signal-communication receiver having a carrier-tracking loop and a processor for operating adaptive algorithms. The method involves interpreting a received signal using space time adaptive processing (STAP). A convergence speed of the adaptive algorithms is set based on a noise bandwidth of a phase-locked loop (PLL) in the carrier-tracking loop. A carrier-phase de-rotation constraint is implemented into weight parameters of the STAP to preserve spatial and temporal degrees of freedom in the STAP.

    摘要翻译: 实现各种系统,方法和设备来处理接收到的信号。 与一个这样的实施例一致,实现了一种用于具有载波跟踪环路的信号通信接收机和用于操作自适应算法的处理器的方法。 该方法涉及使用空间时间自适应处理(STAP)来解释接收到的信号。 基于载波跟踪环路中的锁相环(PLL)的噪声带宽,设置自适应算法的收敛速度。 载波相位去旋转约束被实现为STAP的权重参数,以保持STAP中的空间和时间自由度。

    Geosecurity methods and devices using geotags derived from noisy location data from multiple sources
    6.
    发明申请
    Geosecurity methods and devices using geotags derived from noisy location data from multiple sources 有权
    使用从多个来源的嘈杂位置数据导出的地理标记的地质安全方法和设备

    公开(公告)号:US20110181470A1

    公开(公告)日:2011-07-28

    申请号:US12657677

    申请日:2010-01-25

    IPC分类号: G01S5/02

    摘要: In a geo-security system, a device receives RF signals from multiple distinct classes of RF communication systems and extracts location-dependent signal parameters. A current geotag is computed from the parameters by fuzzy extractors involving quantization of the parameters and Reed-Solomon decoding to provide a reproducible unique geotag. The current geotag is compared with a stored geotag, and a geo-secured function of the device is executed based on the result of the comparison. The use of multiple signal sources of different types, combined with special fuzzy extractors provides a robust geotag that allows both lower false rejection rate and lower false acceptance rate.

    摘要翻译: 在地理安全系统中,设备从多个不同类别的RF通信系统接收RF信号,并提取位置相关的信号参数。 目前的地理标签是通过模糊提取器从参数中计算出来的,这些模糊提取器涉及量化参数和里德 - 所罗门解码,以提供可重现的唯一地理标记。 将当前的地理标签与存储的地理标签进行比较,并根据比较结果执行设备的地理安全功能。 使用不同类型的多个信号源,结合特殊的模糊提取器提供了一个强大的地理标记,允许较低的错误拒收率和较低的错误接受率。

    ARRANGEMENTS FOR SATELLITE-BASED NAVIGATION AND METHODS THEREFOR
    7.
    发明申请
    ARRANGEMENTS FOR SATELLITE-BASED NAVIGATION AND METHODS THEREFOR 失效
    基于卫星导航的安排及其方法

    公开(公告)号:US20090066574A1

    公开(公告)日:2009-03-12

    申请号:US12205521

    申请日:2008-09-05

    IPC分类号: G01S1/00

    CPC分类号: G01S19/21

    摘要: Various systems, methods and devices are implemented for processing received signals. Consistent with one such embodiment, a method is implemented for use in a signal-communication receiver having a carrier-tracking loop and a processor for operating adaptive algorithms. The method involves interpreting a received signal using space time adaptive processing (STAP). A convergence speed of the adaptive algorithms is set based on a noise bandwidth of a phase-locked loop (PLL) in the carrier-tracking loop. A carrier-phase de-rotation constraint is implemented into weight parameters of the STAP to preserve spatial and temporal degrees of freedom in the STAP.

    摘要翻译: 实现各种系统,方法和设备来处理接收到的信号。 与一个这样的实施例一致,实现了一种用于具有载波跟踪环路的信号通信接收机和用于操作自适应算法的处理器的方法。 该方法涉及使用空间时间自适应处理(STAP)来解释接收到的信号。 基于载波跟踪环路中的锁相环(PLL)的噪声带宽,设置自适应算法的收敛速度。 载波相位去旋转约束被实现为STAP的权重参数,以保持STAP中的空间和时间自由度。

    Multipath and tracking error reduction method for spread-spectrum receivers
    8.
    发明授权
    Multipath and tracking error reduction method for spread-spectrum receivers 失效
    用于扩频接收机的多路径和跟踪误差降低方法

    公开(公告)号:US06868110B2

    公开(公告)日:2005-03-15

    申请号:US09728949

    申请日:2000-12-01

    摘要: A multipath mitigation method consists of locating a multipath-invariant (MPI) point of an ideal autocorrelation function and measuring the distance between the MPI point and DLL. The same MPI point is located in a received correlation function, and the distance between the point and the DLL, now affected by multipath, is measured. The difference between the ideal distance and the actual distance is the code tracking error resulting from multipath. The error is subtracted from the computed pseudorange or used to control the DLL. The method can be used to reduce the effects of all types of tracking error sources, such as signal transmission failure or code noise.

    摘要翻译: 多路径缓解方法包括定位理想自相关函数的多径不变(MPI)点,并测量MPI点和DLL之间的距离。 相同的MPI点位于接收到的相关函数中,并且测量点和现在受多径影响的DLL之间的距离。 理想距离和实际距离之间的差异是由多径产生的代码跟踪误差。 从计算的伪距中减去误差或用于控制DLL。 该方法可用于减少所有类型的跟踪误差源的影响,如信号传输失败或代码噪声。

    Method of and apparatus for Loran-C message communication with reduced
skywave navigation location errors and the like
    9.
    发明授权
    Method of and apparatus for Loran-C message communication with reduced skywave navigation location errors and the like 失效
    用于减少天波导航位置错误的罗兰C消息通信的方法和装置等

    公开(公告)号:US4821038A

    公开(公告)日:1989-04-11

    申请号:US116381

    申请日:1987-11-03

    申请人: Per Enge

    发明人: Per Enge

    CPC分类号: H04B14/026 G01S1/24

    摘要: A Loran-C communications technique and system are disclosed involving appropriate encoding of communication messages and logical multiplication and inversion of encoded signals prior to phase modulation of the Loran-C pulses, with novel bit-flip connections for producing complementary plus and minus modulation position shifts in the first and third and second and fourth, etc., of the Loran-C pulse groups, and with perfect balance irrespective of the nature of the raw data and irrespective of skywave interference.

    摘要翻译: 公开了一种Loran-C通信技术和系统,其涉及在对Loran-C脉冲的相位调制之前对通信消息进行适当编码和编码信号的逻辑乘法和反相,以及用于产生互补正负调制位置偏移的新型位翻转连接 在罗兰C脉冲组的第一,第三,第二和第四等,并且与原始数据的性质无关,并且与天波干扰无关,具有完美的平衡。

    Method and system for deriving location information from utility lines
    10.
    发明授权
    Method and system for deriving location information from utility lines 失效
    从公用事业线导出位置信息的方法和系统

    公开(公告)号:US08120533B2

    公开(公告)日:2012-02-21

    申请号:US11864333

    申请日:2007-09-28

    IPC分类号: G01S3/02 G01S1/24 G01S1/02

    摘要: Location systems and methods are implemented using a variety of arrangements and methods. Using one such system location information is provided in response to a utility-line arrangement propagating signals that represent a wireless radio-frequency (RF) communication originating from one or more remote transmitters. The system includes a receiver circuit communicatively coupled and responsive to the utility-line arrangement. The system also includes a signal-processing logic circuit, communicatively coupled and responsive to the utility-line arrangement. The signal processing logic circuit is arranged to derive location information from characteristics of the signals that are indicative of a location of the receiver circuit relative to the remote transmitters.

    摘要翻译: 位置系统和方法使用各种布置和方法来实现。 响应于公用线路布置传播表示来自一个或多个远程发射机的无线射频(RF)通信的信号的公用线路布置来提供使用一个这样的系统位置信息。 该系统包括通信耦合并响应于公用事业线布置的接收器电路。 该系统还包括信号处理逻辑电路,其通信耦合并且响应于公用事业线布置。 信号处理逻辑电路被布置成从指示接收器电路相对于远程发射器的位置的信号的特性导出位置信息。