北斗用户设备测试系统的设计与实现

Design and implementation of automatic test system for BD-1 user equipment

基于导航定位用户机测试与试验的需要,对"北斗一号"导航接收机测试技术进行了讨论,建立了混合总线的测试体系结构,对其关键技术提出了具体的实现途径:采用数字频率合成器和分频器实现了高精度的频偏和延迟模拟,利用等待式并行数字相关器提高了扩频信号捕获速度和测量精度,基于MVC(Model/View/Controller)设计模式开发了自动化测试应用软件。实践表明:所设计的测试系统具有良好的功能和性能,界面友好,能够满足用户设备测试的要求。

Based on the test requirement of navigation user equipment, the test technology for BD-1 receivers is discussed. A test system was designed based on a mixed-bus framework, the detail solution to some key points was suggested. DDS technique was adopted to simulate the frequency offset and time delay of the dynamic navigation signal. Rapid acquisition and high precision measurement were achieved using a parallel waiting-style digital correlator structure. Automatic test software was developed based on MVC （Model/View/Controler） design pattern. Practical results show that the system has several advantages such as good performance and friendly interface,which meets the test requirements of user equipment.