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    A GPS RECEIVER AND METHOD FOR PROCESSING GPS SIGNALS
    4.
    发明申请
    A GPS RECEIVER AND METHOD FOR PROCESSING GPS SIGNALS 审中-公开
    一种用于处理GPS信号的GPS接收机和方法

    公开(公告)号：WO1997014057A1

    公开(公告)日：1997-04-17

    申请号：PCT/US1996016178

    申请日：1996-10-08

    Applicant: SNAPTRACK, INC.

    Inventor： SNAPTRACK, INC. ,  KRASNER, Norman, F.

    IPC: G01S05/14

    CPC classification number: H04B1/3805 ,  G01S5/0027 ,  G01S5/0036 ,  G01S5/0054 ,  G01S19/07 ,  G01S19/09 ,  G01S19/11 ,  G01S19/235 ,  G01S19/252 ,  G01S19/254 ,  G01S19/256 ,  G01S19/258 ,  G01S19/34 ,  G01S19/41 ,  G01S2205/008 ,  G06F2221/2111 ,  H01Q1/273 ,  H01Q21/28 ,  H03D7/163 ,  H03J7/06 ,  H03J2200/11

    Abstract: A global positioning system (GPS) receiver has first circuitry for receiving and processing pseudorandom sequences transmitted by a number of GPS satellites. The first circuitry is configured to perform conventional correlation operations on the received pseudorandom sequences to determine pseudoranges from the GPS receiver to the GPS satellites. The GPS receiver also includes second circuitry coupled to the first circuitry. The second circuitry is configured to receive and process the pseudorandom sequences during blockage conditions. The second circuitry processes the pseudorandom sequences by digitizing and storing a predetermined record length of the received sequences and then performing fast convolution operations on the stored data to determine the pseudoranges. The GPS receiver may have a common circuitry for receiving GPS signals from in view satellites and downconverting the RF frequency of the received GPS signals to an intermediate frequency (IF). The IF signals are split into two signal paths, a first of which provides the conventional correlation processing to calculate the pseudoranges. During blockage conditions, the IF signal is passed to the second signal path wherein the IF signals are digitized and stored in memory and later processed using the fast convolution operations to provide the pseudoranges. Alternative arrangements for the two signal paths include separate downconverters or shared digitizers. One embodiment provides both signal paths on a single integrated circuit with shared circuitry executing computer-readable instructions to perform GPS signal processing appropriate to the reception conditions.

    Abstract translation: 全球定位系统（GPS）接收机具有用于接收和处理由多个GPS卫星发送的伪随机序列的第一电路。 第一电路被配置为对所接收的伪随机序列执行传统的相关操作，以确定从GPS接收机到GPS卫星的伪距离。 GPS接收机还包括耦合到第一电路的第二电路。 第二电路被配置为在阻塞状态期间接收和处理伪随机序列。 第二电路通过数字化并存储接收到的序列的预定记录长度然后对所存储的数据执行快速卷积运算来确定伪距来处理伪随机序列。 GPS接收机可以具有用于从视频卫星接收GPS信号并将接收的GPS信号的RF频率下变频到中频（IF）的公共电路。 IF信号被分成两个信号路径，第一个信号路径提供常规的相关处理来计算伪距离。 在阻塞条件期间，IF信号被传递到第二信号路径，其中IF信号被数字化并存储在存储器中，并且随后使用快速卷积运算来处理以提供伪距。 两个信号路径的替代布置包括单独的下变频器或共享数字化仪。 一个实施例在单个集成电路上提供两个信号路径，共享电路执行计算机可读指令以执行适合于接收条件的GPS信号处理。

    METHOD AND APPARATUS FOR DETERMINING THE LOCATION OF AN OBJECT WHICH MAY HAVE AN OBSTRUCTED VIEW OF THE SKY
    5.
    发明申请
    METHOD AND APPARATUS FOR DETERMINING THE LOCATION OF AN OBJECT WHICH MAY HAVE AN OBSTRUCTED VIEW OF THE SKY 审中-公开
    用于确定可能对天空造成影响的物体的位置的方法和装置

    公开(公告)号：WO1997014055A1

    公开(公告)日：1997-04-17

    申请号：PCT/US1996016160

    申请日：1996-10-08

    Applicant: SNAPTRACK, INC.

    Inventor： SNAPTRACK, INC. ,  KRASNER, Norman, F.

    IPC: G01S05/14

    CPC classification number: G01S19/235 ,  G01S5/0027 ,  G01S5/0036 ,  G01S5/0045 ,  G01S5/009 ,  G01S19/07 ,  G01S19/09 ,  G01S19/11 ,  G01S19/252 ,  G01S19/254 ,  G01S19/256 ,  G01S19/258 ,  G01S19/34 ,  G01S19/37 ,  G01S19/41 ,  G01S2205/008 ,  G06F2221/2111 ,  H01Q1/273 ,  H01Q21/28 ,  H03D7/163 ,  H03J7/06 ,  H03J2200/11 ,  H04B1/3805 ,  H04B2001/3894

    Abstract: A positioning sensor receives and stores a predetermined record length of positioning signals while in a fix position located such that the positioning sensor can receive positioning signals. Thereafter, the stored positioning signals are processed to determine the geographic location of the fix position. The fix position may correspond to a location of an object of interest or it may be in a known location relative to the position of the object, in which case once the geographic location of the fix position has been computed, the geographic location of the object can be derived. The positioning sensor includes a Snapshot GPS receiver which may collect and process GPS signals transmitted by GPS satellites using fast convolution operations to compute pseudoranges from the GPS satellites to the fix position. Alternatively, these computations may be performed at a basestation. The computed pseudoranges may then be used to determine the geographic location of the fix position. The positioning sensor may be equipped with depth sensing means, such as a pressure sensor, which allows a determination of the depth of submerged object to be made. The positioning sensor may further be equipped with signal detecting means for determining when the positioning sensor is in the fix position.

    Abstract translation: 定位传感器接收并存储定位信号的预定记录长度，同时位于定位传感器可以接收定位信号的固定位置。 此后，处理存储的定位信号以确定固定位置的地理位置。 固定位置可以对应于感兴趣对象的位置，或者它可以在相对于对象的位置的已知位置中，在这种情况下，一旦已经计算了固定位置的地理位置，该对象的地理位置 可以派生。 定位传感器包括一个快照GPS接收器，它可以采集快速卷积运算来收集和处理由GPS卫星发射的GPS信号，以计算从GPS卫星到固定位置的伪距。 或者，这些计算可以在基站执行。 然后可以使用计算的伪距来确定固定位置的地理位置。 定位传感器可以配备有诸如压力传感器的深度感测装置，其允许确定要被制造的浸没物体的深度。 定位传感器还可以配备有用于确定定位传感器何时处于固定位置的信号检测装置。

    COMBINED GPS POSITIONING SYSTEM AND COMMUNICATIONS SYSTEM UTILIZING SHARED CIRCUITRY
    8.
    发明申请
    COMBINED GPS POSITIONING SYSTEM AND COMMUNICATIONS SYSTEM UTILIZING SHARED CIRCUITRY 审中-公开
    组合GPS定位系统和通信系统利用共享电路

    公开(公告)号：WO1997014056A1

    公开(公告)日：1997-04-17

    申请号：PCT/US1996016176

    申请日：1996-10-08

    Applicant: SNAPTRACK, INC.

    Inventor： SNAPTRACK, INC. ,  KRASNER, Norman, F.

    IPC: G01S05/14

    CPC classification number: H04B1/0007 ,  G01S5/0027 ,  G01S5/0036 ,  G01S5/0054 ,  G01S5/0063 ,  G01S19/07 ,  G01S19/09 ,  G01S19/235 ,  G01S19/252 ,  G01S19/254 ,  G01S19/256 ,  G01S19/258 ,  G01S19/34 ,  G01S19/37 ,  G01S2205/008 ,  G06F2221/2111 ,  H01Q1/273 ,  H01Q21/28 ,  H03D7/163 ,  H03J7/04 ,  H03J7/06 ,  H03J2200/11 ,  H04B1/00 ,  H04B1/28 ,  H04B1/3805 ,  H04B2001/3894

    Abstract: A combined GPS and communication system having shared circuitry. The combined systems includes an antenna for receiving data representative of GPS signals, a frequency converter coupled to the antenna, a frequency synthesizer coupled to the frequency converter, an analog to digital converter coupled to the frequency converter and a processor coupled to the frequency converter. The processor processes the data representative of GPS signals to determine a pseudorange based on the data representative of GPS signals. The integrated communication receiver includes a shared component which is at least one of the antenna, the frequency converter, the frequency synthesizer and the analog to digital converter. Typically, in certain embodiments the processor also demodulates communication signals received as well as controls the modulation of data to be transmitted as a communication signal through a communication link.

    Abstract translation: 具有共享电路的组合的GPS和通信系统。 组合系统包括用于接收表示GPS信号的数据的天线，耦合到天线的频率转换器，耦合到变频器的频率合成器，耦合到变频器的模数转换器和耦合到变频器的处理器。 处理器处理表示GPS信号的数据，以基于表示GPS信号的数据来确定伪距。 集成通信接收机包括作为天线，频率转换器，频率合成器和模数转换器中的至少一个的共享部件。 通常，在某些实施例中，处理器还对所接收的通信信号进行解调，并且通过通信链路控制要作为通信信号发送的数据的调制。

    CLIENT-SERVER-BASED REMOTE LOCATOR DEVICE
    9.
    发明申请
    CLIENT-SERVER-BASED REMOTE LOCATOR DEVICE 审中-公开
    基于客户端的远程定位器设备

    公开(公告)号：WO1997014054A1

    公开(公告)日：1997-04-17

    申请号：PCT/US1996016159

    申请日：1996-10-08

    Applicant: SNAPTRACK, INC.

    Inventor： SNAPTRACK, INC. ,  GIRERD, Richard, J. ,  KRASNER, Norman, F.

    IPC: G01S05/14

    CPC classification number: G01S19/235 ,  G01S19/09 ,  G01S19/254 ,  G01S19/29 ,  G01S19/30 ,  G01S19/34 ,  G01S19/37 ,  G01S19/46 ,  G01S2205/008 ,  G06F2221/2111 ,  H01Q1/273 ,  H01Q21/28 ,  H03D7/163 ,  H03J7/06 ,  H03J2200/11 ,  H04B1/3805

    Abstract: A user accesses a server using a client. The client provides an identification code which serves to uniquely identify a remote sensor. The remote sensor is capable of providing information related to its position. The server interrogates the remote sensor and, in response, the remote sensor transmits positioning data to the server where it is analyzed to derive the location of the remote sensor. The location so determined is transmitted from the server to the client and is displayed at the client so that the user can identify the location of the remote sensor. The client and the server may be connected to a computer network and the client may use a web browser to interrogate the server. The remote sensor may be a SNAPSHOT GPS receiver or other GPS receiver or positioning device. The user display may be a simple position report, e.g., latitude and longitude, or a graphical report which provides an indication of the remote sensor's location superimposed on a map or other reference.

    Abstract translation: 用户使用客户端访问服务器。 客户端提供用于唯一识别远程传感器的识别码。 远程传感器能够提供与其位置相关的信息。 服务器询问远程传感器，作为响应，远程传感器将定位数据发送到服务器进行分析，以得出远程传感器的位置。 如此确定的位置从服务器发送到客户端，并在客户端显示，以便用户可以识别远程传感器的位置。 客户机和服务器可以连接到计算机网络，并且客户机可以使用网络浏览器来询问服务器。 遥感器可以是SNAPSHOT GPS接收器或其他GPS接收器或定位装置。 用户显示可以是简单的位置报告，例如纬度和经度，或图形报告，其提供叠加在地图或其他参考上的远程传感器位置的指示。

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