Research Of Automatic Test System For The Receivers Of GNSS

At present, a satellite navigation system developed by China independently is being constructed. As the Terminal of the satellite navigation system,the Receivers'test method's research test system's construction as well as performance assessment have not matured.The test theory,test platform,and performance assessment for the receivers has not been studied, the test platform which must be accurate and reliable should be as automatic as possible due to the complexity of the receivers. Regarding the test platform's characteristics and complexity, this article has studied its test method as well as the test automation technology. This thesis designed and implemented a set of automatic test systems for automatic receiver test, making full use of the universal apparatus. It contains three sections:Firstly, after evaluation of the satellite signal characteristic as well as the receiver's working environment, we build a Receiver auto test platform by using universal apparatus and simulated different scenes for various environment. Based on this, this thesis proposed an abstract model for the receiver auto test platform and designed its architecture, as well as finished the hardware design.In the second part, the test requirement for receivers is studied; Key elements such as navigation signal simulator, jam simulator, auto data processing, and auto test flow control are further investigated and their solutions are presented. Function module partition for auto test platform software is carried out based on the software modularization. Flow charts and the connections between modules are given in detail, which complete the software design.Finally, a concrete test example is introduced. Design steps for test samples, the test platform's working status and the auto data processing techniques are proposed.The auto test platform designed in this thesis has been implemented in the testing procedure for a type of receivers, which improved the reliability of the test results and the automation. The design ideas of this test platform can be used for other similar equipment auto-test systems.