Method for analyzing compatibility of satellite navigation system

A technology of satellite navigation system and analysis method, which is applied in the compatibility analysis of satellite navigation system and the field of compatibility analysis of navigation system using code tracking spectrum isolation coefficient, which can solve the problems of compatibility evaluation limitations and other issues

Inactive Publication Date: 2012-11-28
CHINA ACADEMY OF SPACE TECHNOLOGY
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Problems solved by technology

However, the current equivalent carrier-to-noise ratio analysis method is limited to the navigation signal acquisition, carrier tracking and data demodulation process. The performance of navigation signal acquisition, carrier tracking and data demodulation all depends on the r

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  • Method for analyzing compatibility of satellite navigation system
  • Method for analyzing compatibility of satellite navigation system
  • Method for analyzing compatibility of satellite navigation system

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Embodiment 1

[0090] A method for analyzing the compatibility of satellite navigation systems based on the code tracking spectrum isolation coefficient in this embodiment includes the following steps:

[0091] Step 1: The TOA (Time of Arrive) module has the functions of an estimator and a filter. The TOA module is used to analyze the influence of the code phase estimation error on the TOA estimator and filter results, and obtain a smooth TOA estimator and a non-smooth TOA estimate The relationship between the device variance;

[0092] A typical GPS receiver channel such as figure 1 As shown, this part mainly completes the acquisition, tracking and data demodulation, and estimates the position, velocity and time. After first capturing the target working satellite signal and obtaining a rough estimate of Doppler frequency shift and code phase, the receiver switches to continuous signal tracking mode.

[0093] Since the code tracking loop of any kind of discriminator is based on the result o...

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Abstract

The invention discloses a method for analyzing compatibility of a satellite navigation system based on a code tracking frequency spectral separation coefficient, relates to a method for analyzing compatibility of a satellite navigation system, and belongs to the field of satellite navigation. The method comprises the following steps: using a TOA module to analyze influence of a code phase evaluated error on results of a TOA estimator and a filter, to obtain relations of a variance of a smooth TOA estimator and an unsmooth TOA estimator; analyzing influence of the code phase evaluated error and a carrier frequency evaluated error on a code tracking error, to obtain a code tracking error of a code tracking loop advanced-lag process under interference; determining a spectral separation coefficient based on the code tracking; determining equivalent carrier-to-noise ratio of the satellite navigation system in code tracking; and using the obtained equivalent carrier-to-noise ratio to assess influence of navigation interference signals on a target signal in a signal code tracking state of the satellite navigation system, determining the compatibility of the satellite navigation system. The method can improve assessment precision of compatibility among satellite navigation systems, and improve anti-interference among signals of the satellite navigation systems.

Description

technical field [0001] The invention relates to a satellite navigation system compatibility analysis method, in particular to a navigation system compatibility analysis method using a code tracking spectrum isolation coefficient, and belongs to the field of satellite navigation. Background technique [0002] The Global Navigation Satellite System (GNSS) is a set of systems developed by various countries for military or civilian purposes that uses satellites to provide position and time. Satellite navigation and positioning technology can be used. [0003] With the development of satellite navigation technology and the continuous expansion of its application fields, many countries in the world have stepped up the construction of independent satellite navigation systems. The United States is implementing the GPS modernization plan, Russia is stepping up efforts to restore the full performance of GlONASS, the European Union is building GALILEO, and China is stepping up the con...

Claims

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Application Information

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IPC IPC(8): G01S19/23G01S19/24
Inventor 张建军马骏陈忠贵黄宇民
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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