公开(公告)号：US06801162B1

公开(公告)日：2004-10-05

申请号：US10414771

申请日：2003-04-16

申请人： Kenneth J. Eckenroth ,  Michael E. Ostteen

发明人： Kenneth J. Eckenroth ,  Michael E. Ostteen

IPC分类号： G01S502

CPC分类号： G01R31/083 ,  G01S3/54

摘要： Provided is a Doppler based automated direction finding system that detects radio frequency (RF) leaks in a cable television plant. During a ride-out, the system detects leaks and stores leak data, such as amplitude, location, and bearing. The stored data is uploaded to a computer that performs a leak analysis. The leak analysis isolates the leaks using Doppler-based bearing information and separates cable leaks from other RF sources, such as power sources and noise. Erroneous information that results from RF reflections (multi path) may be eliminated while processing the data using triangulation. After the leak analysis, the computer generates work orders and maps, makes the data available to users, and may also compile information and file reports based on the data.

摘要翻译： 提供了一种用于检测有线电视设备中的射频（RF）泄漏的基于多普勒的自动测向系统。 在驾驶期间，系统检测泄漏并存储泄漏数据，例如振幅，位置和方位。 存储的数据被上传到执行泄漏分析的计算机。 泄漏分析使用基于多普勒的轴承信息隔离泄漏，并将电缆泄漏与其他RF源（如电源和噪声）分开。 在使用三角测量处理数据时，可能会消除由RF反射（多路径）引起的错误信息。 泄漏分析后，计算机生成工单和地图，使数据可供用户使用，也可根据数据编制信息和文件报告。

公开(公告)号：US06774843B2

公开(公告)日：2004-08-10

申请号：US10103881

申请日：2002-03-25

申请人： Masato Takahashi

发明人： Masato Takahashi

IPC分类号： G01S502

CPC分类号： G01S19/53 ,  G01S19/36

摘要： A method for acquiring azimuth information enables acquisition of azimuth information by receiving signals transmitted by GPS satellites using only a single antenna. The method includes steps of disposing a GPS planar antenna having a hemispherical beam with its beam center horizontal to form a sky coverage area of antenna sensitivity that is a sky quarter-sphere in the direction the GPS antenna faces, causing a GPS receiver connected to the GPS antenna to attempt reception of signals transmitted by GPS satellites, inputting the received signals to a data processing unit to discriminate satellites present in the coverage area, arranging the satellites found to be present in the sky coverage area in clockwise order as viewed from the start azimuth of the sky coverage area; extracting the azimuth of the satellite corresponding to the last term in the order as a start azimuth and the direction opposite the azimuth of the satellite corresponding to the first term in the order as an end azimuth, using the extracted start azimuth and end azimuth to limit the azimuth of the direction in which the antenna faces, and outputting the limited azimuth information as voice message or an image using a result output unit.

摘要翻译： 用于获取方位信息的方法使得能够通过仅使用单个天线接收由GPS卫星发送的信号来获取方位信息。 该方法包括以下步骤：将具有其波束中心水平的半球形波束的GPS平面天线布置成在GPS天线所面向的方向上形成天线灵敏度的天空覆盖区域，该天线覆盖区域是天空四分之一球，导致连接到 GPS天线尝试接收由GPS卫星发送的信号，将接收到的信号输入到数据处理单元，以区分存在于覆盖区域中的卫星，从发射时开始以顺时针顺序排列发现在天空覆盖区域中的卫星 天空覆盖区域的方位角; 使用提取的开始方位角和结束方位来将与最后一项对应的卫星的方位角作为起始方位和与该第一项对应的卫星的方位相反的方向作为结束方位， 天线所面向的方向的方位角，并且使用结果输出单元输出有限方位角信息作为语音消息或图像。

公开(公告)号：US06771220B1

公开(公告)日：2004-08-03

申请号：US10402502

申请日：2003-03-28

申请人： Jeffrey M. Ashe ,  Richard C. Gaus, Jr.

发明人： Jeffrey M. Ashe ,  Richard C. Gaus, Jr.

IPC分类号： G01S502

CPC分类号： G01S19/21 ,  H04K3/22 ,  H04K2203/32

摘要： A method and computer program product are disclosed for locating signal jammers in a digital beamforming receiver having an antenna with a plurality of associated antenna orientations. An associated antenna gain value is calculated for a first of a sequence of the plurality of antenna orientations at each of a series of sample points. The antenna gain values from the first antenna orientation are evaluated for null spaces to obtain a set of candidate null locations. Associated antenna gain values are calculated and evaluated for subsequent antenna orientations only at the set of candidate null locations. Candidate null locations are eliminated from the set after any evaluation in which they are not found to be null spaces.

摘要翻译： 公开了一种方法和计算机程序产品，用于在具有多个相关联的天线方位的天线的数字波束成形接收机中定位信号干扰。 针对一系列采样点中的每一个的多个天线方向的序列中的第一个，计算相关联的天线增益值。 对第一天线方向的天线增益值进行零空格的评估，以获得一组候选零位置。 相关的天线增益值仅在候选零位置集合的后续天线取向被计算和评估。 在没有发现空值为空的任何评估之后，候选的零位置从集合中消除。

公开(公告)号：US06765532B2

公开(公告)日：2004-07-20

申请号：US10320965

申请日：2002-12-17

申请人： Thomas R. Vaccaro ,  Norman D. Paul

发明人： Thomas R. Vaccaro ,  Norman D. Paul

IPC分类号： G01S502

CPC分类号： G01S7/021 ,  H01Q3/26 ,  H01Q21/0025 ,  H04B7/086

摘要： A system is provided for assisting in the detection and tracking of narrowband signals arriving at an antenna array operating over a wide detection bandwidth and in a crowded RF environment. Since the nature of the detection mission is constrained to be a general search, the system does not attempt to detect signals of interest via matched filtering mechanisms (i.e. training sets), but exploits general properties such as power, frequency, time and angle of arrival. For the purposes of providing sufficient Frequency/Time resolution as well as to avoid array overloading in the detection process, the digitized wideband streaming data is frequency channelized using a sufficiently high revisit rate for the signal set of interest, constrained by the required feature detection accuracy or environment adaption rates. Within each frequency subchannel, efficient array signal subspace tracking techniques are used to separate and track spatially separated cochannel signals. Subspace tracking allows the efficient update of the signal subspace, useful for direction finding and copy applications, as well as determining the number of signals present in a frequency channel. Since the frequency channelization of the detection system may not match that of the detected signal, the combination of Time/Frequency/Space information is used to cluster or group frequency subchannels and provide a higher degree of signal detection capability with an increased robustness against false signal detections.

摘要翻译： 提供了一种系统，用于帮助检测和跟踪到达在宽检测带宽上操作的天线阵列的窄带信号，并且在拥挤的RF环境中。 由于检测任务的性质被限制为一般搜索，系统不会尝试通过匹配的滤波机制（即训练集）来检测感兴趣的信号，而是利用一般属性，如功率，频率，时间和到达角度 。 为了提供足够的频率/时间分辨率以及在检测过程中避免阵列过载，数字化的宽带流数据被频率信道化，使用对于感兴趣的信号组的足够高的重访速率，由所需的特征检测精度 或环境适应率。 在每个频率子信道内，使用有效阵列信号子空间跟​​踪技术来分离和跟踪空间分离的同信道信号。 子空间跟踪允许对信号子空间的有效更新，对于寻道和复制应用是有用的，以及确定频道中存在的信号的数量。 由于检测系统的频率通道化可能与检测信号的频率通道化不一致，所以使用时间/频率/空间信息的组合来对频率子信道进行聚类或分组，并提供更高程度的信号检测能力，增加对伪信号的鲁棒性 检测。

公开(公告)号：US06727846B1

公开(公告)日：2004-04-27

申请号：US09666111

申请日：2000-09-20

申请人： Alison K. Brown

发明人： Alison K. Brown

IPC分类号： G01S502

CPC分类号： G01S19/22 ,  G01S3/74 ,  G01S19/36

摘要： A digital GPS receiver includes electronics to detect the presence of multipath GPS signals, determine the direction from which they are received at a multi-element GPS phased array antenna, adaptively generate an antenna pattern to provide gain in the direction of the desired GPS satellite signal, and to apply nulls in the direction of the detected GPS multipath signals. This adaptively-generated antenna pattern is applied to the signals received at the elements of the GPS phased array antenna to provide a composite signal to each of the processing channels of the digital GPS receiver, optimized for the particular GPS satellite being tracked by a corresponding channel. The undesirable multipath GPS signals are thereby excised from the inputs to the processing channels of the digital GPS receiver, and the desired direct signal is reinforced, thus enabling tracking loops within the digital GPS receiver to make highly accurate observations of the code and carrier phase using conventional signal processing techniques.

摘要翻译： 数字GPS接收机包括用于检测多径GPS信号的存在的电子装置，确定它们在多元素GPS相控阵列天线处的接收方向，自适应地产生天线方向图，以在所需的GPS卫星信号的方向上提供增益 并且在检测到的GPS多路径信号的方向上应用零点。 将这种自适应生成的天线方向图应用于在GPS相控阵天线的元件处接收到的信号，以向数字GPS接收机的每个处理通道提供复合信号，针对由相应信道跟踪的特定GPS卫星进行了优化 。 因此，不期望的多路径GPS信号从数字GPS接收机的处理通道的输入中被切除，并且加强期望的直接信号，从而使得能够在数字GPS接收器内跟踪回路，以使用代码和载波相位的高精度观测来使用 常规信号处理技术。

公开(公告)号：US06674400B1

公开(公告)日：2004-01-06

申请号：US10384242

申请日：2003-03-10

申请人： Mark W. Hynes

发明人： Mark W. Hynes

IPC分类号： G01S502

CPC分类号： G01S5/0009

摘要： An apparatus for providing GPS positioning information to a master computer and a plurality of slave computers from only one GPS receiver. The apparatus includes a circuit adapted to be coupled between the GPS receiver and the computers for providing each computer with a replica of a positioning information signal from the GPS receiver so that each computer receives all of the positioning information it would have received if it had been connected to its own GPS receiver. In addition, the apparatus includes a circuit adapted to be coupled between the GPS receiver and the computers for providing each computer with a replica of a synchronizing signal from the GPS receiver so that each computer receives the synchronizing signal it would have received if it had been connected to its own GPS receiver. Further, the apparatus includes a circuit adapted to be coupled between the GPS receiver and the master computer for passing a control signal from the master computer to the GPS receiver to set up and control the state of the GPS receiver.

摘要翻译： 一种用于仅从一个GPS接收机向主计算机和多个从计算机提供GPS定位信息的装置。 该装置包括适于耦合在GPS接收机和计算机之间的电路，用于向每个计算机提供来自GPS接收机的定位信息信号的复制品，使得每个计算机接收到它将被接收的所有定位信息 连接到自己的GPS接收器。 此外，该装置包括适于耦合在GPS接收机和计算机之间的电路，用于向每个计算机提供来自GPS接收机的同步信号的复制品，使得每个计算机接收它将被接收的同步信号 连接到自己的GPS接收器。 此外，该装置包括适于耦合在GPS接收机和主计算机之间的电路，用于将控制信号从主计算机传送到GPS接收机，以建立和控制GPS接收机的状态。

公开(公告)号：US06664923B1

公开(公告)日：2003-12-16

申请号：US10253161

申请日：2002-09-24

申请人： Thomas John Ford

发明人： Thomas John Ford

IPC分类号： G01S502

CPC分类号： G01S19/47 ,  G01S19/44

摘要： A GPS receiver utilizes measurements which span previous and current times, such as delta phase measurements, in a modified Kalman filter. The modified Kalman filter updates position information relating to both the current and the previous times, and s propagates the current position and velocity related information. Using both the current and the previous position related information in the filter in conjunction with delta phase measurements, essentially eliminates the effect of system dynamics from the system model, and a position difference can thus be formed that is directly observable by the phase difference measured between the previous and current time epochs.

摘要翻译： GPS接收机利用在改进的卡尔曼滤波器中跨越先前和当前时间的测量，例如δ相位测量。 改进的卡尔曼滤波器更新与当前和先前时间有关的位置信息，并且s传播当前位置和速度相关信息。 同时使用过滤器中的当前位置和前一位置相关信息与增量相位测量结合使用，基本上消除了系统模型对系统动力学的影响，从而可以形成直接可以通过在 以前和当前时代的时代。

公开(公告)号：US06650284B1

公开(公告)日：2003-11-18

申请号：US10046201

申请日：2002-01-16

申请人： Robin Thomas Mannings ,  Nigel David Charles Wall

发明人： Robin Thomas Mannings ,  Nigel David Charles Wall

IPC分类号： G01S502

CPC分类号： G08G1/096716 ,  G01C21/34 ,  G01C21/3492 ,  G01S5/0027 ,  G01S19/09 ,  G01S19/41 ,  G01S19/48 ,  G01S19/49 ,  G01S2205/002 ,  G01S2205/006 ,  G01S2205/008 ,  G08G1/096741 ,  G08G1/096775 ,  G08G1/096811 ,  G08G1/096822 ,  G08G1/096861 ,  G08G1/096872 ,  G08G1/096883 ,  G08G1/096888 ,  G08G1/127 ,  G09B29/106

摘要： Apparatus provides information to a mobile user. The apparatus includes a mobile communications system having a fixed part and one or more mobile parts for communicating with the fixed part. The fixed part is adapted to receive one or more requests for user-specific information from the mobile part, and to provide the user with information relating to the or each request. Preferably the mobile user has access to permanent user-specific information and/or non-permanent user-specific information, and the mobile part is adapted to send said permanent user-specific information and/or non-permanent user-specific information to the fixed part.

摘要翻译： 装置向移动用户提供信息。 该装置包括具有固定部分和用于与固定部分通信的一个或多个移动部件的移动通信系统。 固定部分适于从移动部分接收用户特定信息的一个或多个请求，并向用户提供与该请求或每个请求有关的信息。 优选地，移动用户可以访问永久的用户特定信息和/或非永久用户特定信息，并且移动部分适于将所述永久用户特定信息和/或非永久用户特定信息发送到固定 部分。

公开(公告)号：US06646595B1

公开(公告)日：2003-11-11

申请号：US10216011

申请日：2002-08-09

申请人： Mark A. Heng ,  Russell D. Thomas ,  Maya Tampi

发明人： Mark A. Heng ,  Russell D. Thomas ,  Maya Tampi

IPC分类号： G01S502

CPC分类号： G01S19/09 ,  H04B1/3805

摘要： A GPS receiver (26) for processing GPS satellite signals and adapted for connection to a client device (24). The receiver (26) includes a down converter (44), a correlator (46), and a microcomputer A. The microcomputer A has a microprocessor A, a first memory (48A), a second memory (48B, 148B), and an input/output interface (50). The input/output interface (50) is capable of being connected to the client device (24). The first memory (48A) contains a first set of instructions for the microprocessor A to download and store in the second memory (48B, 148B) at least one time critical GPS software module (A1, A2, . . . AN) from the client device (24). The first memory (48A) also contains a second set of instructions for the microprocessor A to determine whether to download and store in the second memory (48B, 148B) a plurality of non-time critical software modules (B1, B2, . . . BN) from the client device (24).

摘要翻译： 一种用于处理GPS卫星信号并适于连接到客户设备（24）的GPS接收器（26）。 接收器（26）包括下变频器（44），相关器（46）和微型计算机A.微计算机A具有微处理器A，第一存储器（48A），第二存储器（48B，148B）和 输入/输出接口（50）。 输入/输出接口（50）能够连接到客户端设备（24）。 第一存储器（48A）包含第一组指令，用于微处理器A从客户端下载和存储至少一个关键的GPS软件模块（A1，A2 ...，AN）到第二存储器（48B，148B） 装置（24）。 第一存储器（48A）还包含第二组指令，用于微处理器A确定是否在第二存储器（48B，148B）中下载和存储多个非时间关键软件模块（B1，B2，...， BN）。

公开(公告)号：US06621453B2

公开(公告)日：2003-09-16

申请号：US09960241

申请日：2001-09-21

申请人： Jeffrey R. Ring

发明人： Jeffrey R. Ring

IPC分类号： G01S502

CPC分类号： G01S19/14 ,  G01S19/53

摘要： By using the GPS satellite transmitted signals that are tracked on a satellite and those that should be tracked but are not due to the attitude of the satellite and rotating the satellite, two estimations of satellite attitude are made that are used to change the satellite attitude so that all the GPS signals are tracked.