System for evaluating performance of satellite navigation system

Abstract

The invention relates to a system for evaluating the performance of a satellite navigation system. The system has a real-time evaluation mode and a playback evaluation mode and comprises a system positioning accuracy evaluation module, a system velocity measurement accuracy evaluation module, a system availability evaluation module, a system completeness evaluation module, a configuration holding capacity evaluation module and a multipath delay evaluation module, wherein the system positioning accuracy evaluation module evaluates system positioning accuracy by calculating a user equivalent range error and using a statistical method; the system velocity measurement accuracy evaluation module obtains a system velocity measurement accuracy conclusion by calculating a user pseudo-range error and using the statistical method; the system availability evaluation module respectively calculates the availability of the common mode and a wide area differential mode to obtain a system availability conclusion; the system completeness evaluation module obtains a system completeness conclusion by calculating the completeness of three parts, namely a satellite, a ground operational control system and a receiver; the configuration holding capacity evaluation module obtains a configuration holding capacity conclusion by counting constellation occupied time percentage; and the multipath delay evaluation module obtains a multipath delay conclusion by calculating the delay, amplitude and phase difference of a multipath signal relative to a direct signal. The system is easy to implement in engineering and can effectively evaluate the performance of the satellite navigation system.

Description

Technical field [0001] The invention relates to a system performance evaluation system, particularly a satellite navigation system performance evaluation system, belonging to the field of satellite navigation. Background technique [0002] The satellite navigation system mainly includes a space constellation part, a ground control part and a user terminal part. Its main function is to provide continuous, real-time, high-precision three-dimensional position, speed, and accurate time information to global users. [0003] At present, the second-generation satellite navigation system project in my country has been launched. In order to deepen the understanding of the navigation test results, find out the advantages and disadvantages of the system, and assist the navigation system verification, system development and subsequent program design, it is necessary for satellite navigation The test results of the system in various modes are analyzed and evaluated. This needs to be considered ...

AI Technical Summary

Problems solved by technology

The key task of navigation system performance evaluation is to establish a set of effective performance evaluation indicators and evaluation methods for the specific needs of navigation in our country. At present, foreign countries have blocked this field from abroad, but there is no systematic and in-depth research in this field in China.

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