Method for determining a wrong synchronization of a receiver with a satellite, associated receiver and computer program product

a technology of satellite synchronization and computer program product, which is applied in the field of wrong synchronization of satellite synchronization, can solve the problems of insufficient method, relatively time-consuming, and wrong synchronization

Active Publication Date: 2020-03-17
THALES SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical effect of this invention relates to improving methods called spread-codes that can be applied on signals without changing their structure or making them easier to analyze compared with traditional ways such as adding extra characters like digits or numbers into certain parts of an image.

Problems solved by technology

The technical problem addressed in this patents relates to improving the accuracy (precision) of navigational devices like Global Navigation Satellite System (GNSS), particularly during long periods where reception takes place indoors without any obstacles.

Method used

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  • Method for determining a wrong synchronization of a receiver with a satellite, associated receiver and computer program product
  • Method for determining a wrong synchronization of a receiver with a satellite, associated receiver and computer program product
  • Method for determining a wrong synchronization of a receiver with a satellite, associated receiver and computer program product

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Embodiment Construction

[0056]In the rest of the description, the expression “substantially equal to” refers to an equality relationship to within plus or minus 10%.

[0057]FIG. 1 shows a global navigation satellite system (GNSS) 10.

[0058]In reference to this FIG. 1, the positioning system 10 includes a plurality of satellites Satn positioned in different orbits around the Earth for which the positioning system 10 is established.

[0059]The total number of satellites Satn is for example equal to 30.

[0060]The index n corresponds to an identifier of each satellite Satn, and for example varies between 1 and 30.

[0061]Each satellite Satn is able to transmit electromagnetic signals S toward part of the Earth's surface 14 that it is flying over.

[0062]In particular, the satellites Satn are arranged such that at least four satellites Satn are able to transmit electromagnetic navigation signals S toward substantially each point of the Earth's surface 14.

[0063]The current position of each satellite Satn is characterized by

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Abstract

A method for determining a wrong synchronization of a receiver with a satellite, associated receiver and computer program product, is implemented after the acquisition phase and includes the following steps:
    • generating first and second test signals;
      • for each correlation interval, determining a first prompt correlator corresponding to the correlation value between the received signal and the first test signal, and a second prompt correlator corresponding to the correlation value between the received signal and the second test signal;
    • determining first and second energy values corresponding to the energy of the first and second correlators, respectively;
    • determining a wrong synchronization indicator based on the difference between the first and second energy values; and
    • detecting a wrong synchronization based on this indicator.

Description

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Claims

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Application Information

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Owner THALES SA
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