Management method for global positioning system receiver navigation message

A global positioning system and navigation message technology, which is applied in the field of navigation message management of GPS receivers, can solve the problems that the receiver cannot receive GPS signals, etc., and achieve the effects of improving hot start positioning speed, simple management, and clear structure

Active Publication Date: 2009-07-29
北京中科微知识产权服务有限公司
View PDF0 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Driving vehicles often encounter obstacles such as bridges, buildings, tunnels, etc.,

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Management method for global positioning system receiver navigation message
  • Management method for global positioning system receiver navigation message
  • Management method for global positioning system receiver navigation message

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0071] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0072] The GPS baseband chip is the chip that processes the baseband signal in the GPS receiver and is the core of the entire GPS receiver. Various methods of the present invention are implemented in a GPS baseband chip. For the sake of convenience, "receiver" in the present invention refers to "GPS baseband chip".

[0073] figure 1 A typical GPS receiver implementation method for positioning is described. Knowing the positions 101 of the four satellites and the pseudoranges 102 between the four satellites and the receiver, that is, the error value of the receiver's position 103 and the receiver time relative to the satellite time can be calculated through the so-called "pseudorange observation equation" . The formula is as follows:

...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to the field of global satellite positioning and navigation, such as a GPS system, in particular to a navigation message management method which is used for a GPS receiving machine. The method comprises the steps as follows: the receiving machine internally comprises three parts of navigation message spaces: one part is used for receiving demodulation data, another part is used for memorizing backup and the third part is used for calculation. When the demodulation is completed and the calibration is passed, the navigation message in the demodulation navigation message space is updated and caculated; if the demodulation is not completed or the calibration is not passed, within the validity period of the message and when comforming with a certain synchronous condition, the navigation message is updated and calculated by the backup navigation message so as to realize the calculation of the user position till that the demodulation navigation message is available. The navigation message management method has clear structure, simple management, safety and reliability, can greatly reduce the time required for positioning after catching the satellite, and greatly improves the hot booting positioning speed, warm booting positioning speed and re-positioning speed after loss of signal.

Description

technical field [0001] The present invention relates to the field of global satellite positioning and navigation, such as the GPS system, in particular to the field of a navigation message management method for a global positioning system receiver. Background technique [0002] Global satellite positioning and navigation systems, such as the Global Positioning System (GPS), include a constellation of satellites (also known as Navstar satellites) that transmit GPS signals that can be used by a receiver to determine the receiver's location. Satellite orbits are arranged in multiple planes so that the signal can be received from at least four satellites at any location on Earth. More typically, the signal is received from more than six satellites in most places on Earth. [0003] The GPS signal transmitted by each GPS satellite is a direct sequence spread spectrum signal. The commercially used signal is associated with the Standard Positioning Service (SPS) and is a direct-se...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01S1/02G01S5/02G01S5/14
Inventor 郑睿陈杰
Owner 北京中科微知识产权服务有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap