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106 条记录 (耗时 0.02 秒)

    GPS FRONT END WITH UNIVERSAL DIGITAL INTERFACE
    42.
    发明公开
    GPS FRONT END WITH UNIVERSAL DIGITAL INTERFACE 审中-公开
    GPS前端与环球数字接口

    公开(公告)号：EP1927013A2

    公开(公告)日：2008-06-04

    申请号：EP06849183.6

    申请日：2006-05-09

    申请人： SiRF Technology, Inc.

    发明人： ANDERSON, Erik ,  BABITCH, Daniel ,  HASHEMI, Majid

    IPC分类号： G01S1/00

    CPC分类号： H04B1/28 ,  G01S19/37 ,  H04L2027/0053

    摘要： A radio frequency integrated circuit for a global positioning system (GPS) application mixes radio frequency GPS signals to obtain a predetermined intermediate frequency that is less than 4fo. In one embodiment, the intermediate frequency is selected to be 1.5fo. An intermediate frequency filter (204) then band-limits the intermediate frequency GPS signals, rolling off at a frequency in the vicinity of 2.5 MHz to achieve substantial attenuation at 3.5-4.0 MHz. An automatic gain control circuit (206) amplifies the filtered intermediate frequency GPS signals to proper voltage levels. The amplified intermediate frequency GPS signals is then digitized by an analog-to-digital converter (207) at a predetermined sampling rate more than twice the intermediate frequency to provide samples of a predetermined number of bits, which are then provided for base band processing by a general purpose microprocessor over an industry- standard serial bus.

    PERSONAL COMMUNICATIONS DEVICE WITH GPS RECEIVER AND COMON CLOCK SOURCE
    45.
    发明授权
    PERSONAL COMMUNICATIONS DEVICE WITH GPS RECEIVER AND COMON CLOCK SOURCE 有权
    与GPS接收器和公共时钟源个人通信系统

    公开(公告)号：EP1277286B9

    公开(公告)日：2007-10-31

    申请号：EP01924707.1

    申请日：2001-04-05

    申请人： SiRF Technology, Inc.

    发明人： UNDERBRINK, Paul, A.

    IPC分类号： H04B1/38

    CPC分类号： H03L7/081 ,  G01S19/235 ,  H03L7/1976

    摘要： The invention is directed to a personal telecommunications device having both global positioning systems (GPS) and telecommunications provisions which share a common clock source. GPS provisions include a feedback loop for controlling an oscillator that generates a GPS system signal based upon the common clock signal. The feedback loop includes a frequency synthesizer for generating a feedback control signal, a phase comparator for generating a control signal in accordance with the feedback signal and the common clock signal, and a loop filter for processing and outputting the control signal to the oscillator to control the frequency of GPS system signals.

    LOCATION TAGGING USING POST-PROCESSING
    46.
    发明公开
    LOCATION TAGGING USING POST-PROCESSING 审中-公开
    PLACEMENT注意到POST处理

    公开(公告)号：EP1842078A1

    公开(公告)日：2007-10-10

    申请号：EP06738676.3

    申请日：2006-03-16

    申请人： SiRF Technology, Inc.

    发明人： GRONEMEYER, Steven

    IPC分类号： G01S5/14

    CPC分类号： H04N1/00127 ,  G01S19/09 ,  G01S19/14 ,  H04N1/00323 ,  H04N2101/00 ,  H04N2201/0084 ,  H04N2201/3253 ,  H04N2201/3274

    摘要： A system is provided for storing positional data received from GPS signals in response to an event, and then processing that positional data at a later time to obtain detailed location information of the system at the time of the event. The received GPS signals may be decimated to a desired sampling rate and then stored for later correlation. In one embodiment, the system is a digital camera having an antenna, an RF front end, and a non-volatile memory device. The event which triggers the storage of the positional data is a photo capture by the digital camera. The positional data, in decimated but uncorrelated form, is stored with the image data in the non-volatile memory device. The positional data can then be transferred with the image data to a separate device, such as a personal computer, for post-processing.

    Method and system for a data interface for aiding a satellite positioning system receiver
    48.
    发明公开
    Method and system for a data interface for aiding a satellite positioning system receiver 审中-公开
    方法和系统的数据接口，用于支撑一个卫星定位系统的接收器

    公开(公告)号：EP1813958A3

    公开(公告)日：2007-08-15

    申请号：EP07008108.8

    申请日：2004-10-05

    申请人： SiRF Technology, Inc.

    发明人： Colley, Jaime ,  Boeryd, Lars

    IPC分类号： G01S5/14

    CPC分类号： G01S19/48 ,  G01C21/165

    摘要： The invention described herein relates to aiding a Satellite Positioning System (SPS) receiver of a platform with a data interface to the platform data from a platform data bus. The platform, for example, could be a vehicle, ship, aircraft, or a pedestrian. The SPS receiver could be used to track the location of the platform. The data interface would facilitate access by the SPS receiver to the data of the platform, and the SPS receiver in turn could provide SPS data (such as position, speed, and heading) to the platform.

    Method and system for a data interface for aiding a satellite positioning system receiver
    49.
    发明公开
    Method and system for a data interface for aiding a satellite positioning system receiver 审中-公开
    方法和系统的数据接口，用于支撑一个卫星定位系统的接收器

    公开(公告)号：EP1813958A2

    公开(公告)日：2007-08-01

    申请号：EP07008108.8

    申请日：2004-10-05

    申请人： SiRF Technology, Inc.

    发明人： Colley, Jaime ,  Boeryd, Lars

    IPC分类号： G01S5/14

    CPC分类号： G01S19/48 ,  G01C21/165

    摘要： The invention described herein relates to aiding a Satellite Positioning System (SPS) receiver of a platform with a data interface to the platform data. The platform, for example, could be a vehicle, ship, aircraft, or a pedestrian. The SPS receiver would be used to track the location of the platform. The data interface would facilitate access by the SPS receiver to the data of the platform, and the SPS receiver in turn could provide SPS data (such as position, speed, and heading) to the platform. A further aspect of the invention includes hardware or software used by the data interface and the SPS receiver to provide, format, time-stamp, synchronize, and match platform data or SPS receiver data.

    摘要翻译： 中所述的发明涉及辅助的平台的卫星定位系统（SPS）接收机与来自数据总线平台的数据接口到平台的数据。 该平台，例如，可以是车辆，船舶，飞机，或行人。 SPS接收机可用于跟踪平台的位置。 数据接口将便于由SPS接收机对平台的访问的数据，并且继而SPS接收机可提供PLC数据（颜色：诸如位置，速度和航向）到该平台。