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Method, system and device for position determination with predicted ephemeris

A technology for ephemeris and equipment, applied in the field of satellite-based positioning systems, can solve problems such as increasing processing time, increasing equipment power consumption of GNSS functions, etc.

Inactive Publication Date: 2015-03-25
MARVELL ASIA PTE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additionally, a GNSS enabled device is in a location where it can obtain broadcast ephemeris from the GNSS satellites and demodulate the signal properly, the process of receiving and demodulating adds significantly to the processing time
The extra processing time of course increases TTFF while increasing the power consumption of GNSS enabled devices

Method used

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  • Method, system and device for position determination with predicted ephemeris
  • Method, system and device for position determination with predicted ephemeris
  • Method, system and device for position determination with predicted ephemeris

Examples

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Embodiment Construction

[0015] figure 1 is a block diagram illustrating an exemplary architecture of the positioning system 100 . As shown, system 100 includes a number of components, each designed to provide a specific function. These components include: software stored in a storage device and then executed on a processor to provide the functions, hardware adapted to provide the functions of the components, or a combination of software and hardware that together work to provide the functionality of the component. The depicted architecture can be adapted as a reference Figures 2 to 4 Illustrates any of the exemplary flowcharts or illustrates any number of other processes within the scope of the present disclosure.

[0016] exist figure 1 In the example shown, the GNSS-enabled device 110 includes a GNSS positioning system 112 that includes a radio frequency (RF) module (not shown) in which to acquire GNSS signals and a digital module in which to extract ranging signals and navigation messages. ...

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Abstract

Method, system, and device are provided for position determination with the use of predicted ephemeris to reduce the time-to-first-fix. The method includes: in a device, receiving broadcast orbit data and clock states from a plurality of satellites to determine first assistance data for the plurality of satellites, and numerically predicting first ephemeris for the plurality of satellites using the first assistance data. The method also includes: in a server system, receiving precise orbit data and accurate satellite clock states from a global GNSS service network to determine second assistance data; in a device, receiving the second assistance data and numerically predicting second ephemeris using the second assistance data. The method further includes: in a device, receiving satellite signals from a plurality of satellites, checking the period of validity of the first predicted ephemeris and the second predicted ephemeris respectively to select a predicted ephemeris from both the first predicted ephemeris and the second predicted ephemeris.

Description

[0001] Cross References to Applications [0002] This disclosure claims priority to and claims the benefit of US Provisional Patent Application No. 61 / 876,971, filed September 12, 2013, the entire contents of which are hereby incorporated by reference. technical field [0003] The present disclosure relates to satellite-based positioning systems. More specifically, the disclosure relates to a method, system, and apparatus for position determination using predicted ephemeris to reduce time-to-first-fix. Background technique [0004] Satellite signals from Global Navigation Satellite Systems (GNSS), such as Global Positioning System (GPS), GLONASS, Galileo, and COMPASS, are currently available to mobile devices, also known as GNSS-enabled devices themselves. GNSS signals include ranging signals used to measure pseudo-ranges to satellites and include navigation messages. Navigation messages consist of three main components. The first part contains the GNSS date and time, pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/46H04L29/06
CPCG01S19/27G01S19/258
Inventor 程健贾志科鹿智萃陈剑
Owner MARVELL ASIA PTE LTD
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