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Ephemeris collection device and method thereof

A collection device and ephemeris technology, applied in the direction of measuring devices, satellite radio beacon positioning systems, instruments, etc., can solve the problems of reducing the TTFF performance of the receiver, the receiver cannot complete synchronization, etc., and achieve the effect of saving ephemeris collection time

Inactive Publication Date: 2014-12-03
AOTU ELECTRONICS WUHAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the missing telemetry (TLM) word for subframe 1, the receiver cannot complete synchronization and must discard subframe 1
The result is that the receiver has to wait 5.4 seconds (i.e., the other 9 words in subframe 1 except TLM) to receive subframe 2 and perform subsequent operations, which will significantly reduce the TTFF performance of the receiver

Method used

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  • Ephemeris collection device and method thereof
  • Ephemeris collection device and method thereof
  • Ephemeris collection device and method thereof

Examples

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Embodiment Construction

[0016] Detailed reference will be given below to examples of the present invention. Although the present invention has been illustrated and illustrated by these embodiments, it should be noted that the present invention is not limited to these embodiments. On the contrary, the invention covers all alternatives, modifications and equivalents which are within the spirit and scope of the invention as defined by the appended claims.

[0017] In addition, in order to better illustrate the present invention, numerous specific details are given in the specific embodiments below. It will be understood by those skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the gist of the present invention.

[0018] figure 2 Shown is a schematic diagram of collecting ephemeris from satellite navigation data according to a...

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Abstract

The present disclosure discloses an ephemeris collection device and a method of collecting ephemeris data. The ephemeris collection device may include a data storage unit, configured to store a first part of a first ephemeris subframe if a synchronization of the first ephemeris subframe is not completed; and a subframe merge unit, coupled with the data storage unit and configured to receive a second part of the first ephemeris subframe from the subframe synchronizer and retrieve the first part of the first ephemeris subframe from the data storage unit during a subsequent transmission of the first ephemeris subframe. A complete first ephemeris subframe is obtained based on the first part and the second part of the first ephemeris subframe.

Description

technical field [0001] The present invention relates to an ephemeris collection device and its method, in particular to an ephemeris collection device and its method that use subframe synchronization data to improve the Time To First Fix (TTFF) performance of a satellite receiver cold start . Background technique [0002] Currently, satellite positioning is widely used in various applications, and many parameters are utilized to evaluate the performance of a positioning system receiver, such as a Global Positioning System (GPS) receiver or a Global Navigation Satellite System (GLONASS) receiver. One such parameter is the time delay (also known as TTFF) from when the receiver is turned on until the receiver determines its current position. In general, the receiver with the shortest TTFF is preferred. However, the TTFF of conventional GPS receivers can range from 30 seconds to several minutes. The situation is even worse if the receiver is in a cold start state (meaning no ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/27
CPCG01S19/01G01S19/13G01S19/27G01S19/243
Inventor 邹景华张卫华苟娟
Owner AOTU ELECTRONICS WUHAN
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