Method for analyzing compatibility of satellite navigation system

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...

AI Technical Summary

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 real-time correlator in the receiver. However, the navigation receiver uses a lead-lag correlator to work in the signal code tracking state, and the equivalent carrier-to-noise ratio method has limitations in the compatibility evaluation of the navigation signal code tracking.

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