Research Of Automic Test Technology Of GNSS Receiver Based On Navigation Signal Database

Satellite navigation system has become the most widely used means for the acquisition of position and time,which has the advantages of all-weather,wide coverage and low cost.Because of the great difference in the distribution of the electrical parameters of the navigation signals in different application scenarios,the performance of GNSS receiver is heavily dependent on the surrounding environment,which makes the test solution and methodology based on real scenarios the necessary foundation for the research of navigation algorithm and the development of navigation industry.In this paper,the receiver test solution based on real signal collection and playback is adopted.By establishing the typical scenario database which including the intermediate frequency data and the high-precision calibration data,it provides a basis for the open sharing of the navigation data and the research of the receiver test methodology for the application scenario.Based on abundant typical scenario database,the characteristics of satellite signals in different scenarios are analyzed,the influence of complex scenarios on receiver performance is studied,and the testing method system for test data set,test index set and test process for application scenario are defined.By developing the automatic testing and evaluation system based on typical scenario database,it provides standardized and convenient service for the evaluation of performance and the research of algorithm,and takes account of the test efficiency and accuracy under the premise of meeting the needs of different receivers.According to the test scenario set,by comparing and analyzing the test results of different receivers,it verified the reliability and accuracy of the proposed test and evaluation method,as well as the automated test and evaluation system proposed in this paper.