转发式北斗导航卫星信号性能评估的研究与实现

Research and Realization of Performance Evaluation for Transponder BDS Navigation Satellite Signal

摘要:

北斗一代在使用过程中存在隐蔽性不良,定位实时性差等问题,为了实现北斗导航信号的性能评估,相对于以往的硬件形式,如硬件接收机、频谱分析仪、矢量网络分析仪等,提出了以软件接收机的方法对北斗导航信号进行性能评估;首先分析了转发式北斗导航信号评估的意义、内容与方法,并采用软件接收机的形式进行评估；然后研究了转发式北斗导航的信号性能评估关键技术,给出了捕获、跟踪、评估参数计算的程序流程；最后根据实测数据在Linux高性能集群系统上进行了测试验证,实现了北斗导航信号的捕获、跟踪以及评估中的评估参数计算；测试结果表明,文章中的设计方法可实现北斗导航信号性能的评估,效果良好,评估内容、指标易于调整,便于软件算法参数的测试、升级,可为后续的卫星导航信号评估以及算法测试等提供了一定的依据。

Abstract:

Beidou I^st has bad performance in concealment and real-time positioning. In order to achieve the performance evaluation of Beidou navigation signal, relative to the previous form of hardware, such as hardware receiver, spectrum analyzer, and vector network analyzer, etc., the passage puts forward a method of software receiver to evaluate performance of Beidou navigation signals. First, the significance, content and method of performance evaluation were presented, and the form of software receiver was used to evaluate. Then, key technology for performance evaluation of new BDS signal was studied, and a procedure for acquisition and tracking was given and tested on Linux high performance cluster system at last , as well as parameter calculation. Experiments show that the evaluation can be realized with good effect；evaluation contents、index are easy to adjust and promotion for algorithm、 parameters testing of software is convenient; and can provide the certain basis for satellite navigation signal in subsequent evaluation and algorithm test.