Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method and apparatus for reducing time to first fix (TTFF) of global navigation satellite system (GNSS) receiver

A global navigation satellite and positioning time technology, applied in the field of global navigation satellite system receivers, can solve the problems of harmful button battery environment, unenvironmental protection of end users, and insufficient environmental protection of GNSS receivers, so as to save costs and reduce the first positioning time. , beneficial to environmental protection

Active Publication Date: 2010-06-23
MEDIATEK INC
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The button battery is harmful to the environment, which makes the traditional GNSS receiver not environmentally friendly (environmentally-unfriendly)
Some end-users may feel uncomfortable with yet another product that is not environmentally friendly

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
  • Method and apparatus for reducing time to first fix (TTFF) of global navigation satellite system (GNSS) receiver
  • Method and apparatus for reducing time to first fix (TTFF) of global navigation satellite system (GNSS) receiver
  • Method and apparatus for reducing time to first fix (TTFF) of global navigation satellite system (GNSS) receiver

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] Certain terms are used in the description and claims to refer to particular elements. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. "Include" mentioned throughout the description and claims is an open-ended term, so it should be interpreted as "including but not limited to". In addition, the term "coupled" herein includes any direct and indirect means of electrical connection. Therefore, if it is described that the first device is coupled to the second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection means.

[0012] Please refer to figure 1 , figure 1 is a schemati...

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 present invention provides a method and an apparatus for reducing Time To First Fix (TTFF) of a Global Navigation Satellite System (GNSS) receiver, including storing ephemeris information into a non-volatile memory, and utilizing the ephemeris information to determine a GNSS time, in order to reduce the TTFF. An apparatus for reducing TTFF of a GNSS receiver includes a storage module and a processing module coupled to the storage module. The storage module is utilized for storing data, wherein the stored data in the storage module is non-volatile. The processing module stores ephemeris information into the storage module and utilizes the ephemeris information to determine a GNSS time, in order to reduce the TTFF. By means of the method and apparatus, it is possible to reduce the TTFF of the GNSS receiver so as to save cost and be propitious to circumstance protection.

Description

technical field [0001] The present invention relates to a Global Navigation Satellite System (GNSS) receiver, and in particular to a method for reducing Time To First Fix (TTFF) of a GNSS receiver without reference to real-time time information Methods and devices. Background technique [0002] How to obtain accurate GNSS time when the GNSS receiver enters the start-up mode from the power-off mode is one of the most important issues related to the GNSS receiver. Typically, in a conventional GNSS receiver, all components except the Real Time Clock (RTC) are powered off in shutdown mode. According to the prior art, a common way to obtain the initial GNSS time is: when the GNSS receiver is powered, the RTC reads the RTC time and performs further calculations to obtain the initial GNSS time. After deriving the initial GNSS time of the start mode, correspondingly, some initialization operations can be performed. The accuracy of the initial GNSS time will affect the TTFF of the...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G01S1/02G01S1/04G01S5/02
CPCG01S19/24
Inventor 蔡建良
Owner MEDIATEK INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com