北斗卫星导航产品认证测试系统功率的校准

Power Calibration of Bei Dou Satellite Navigation Product Certification Testing System

北斗卫星导航产品认证测试系统是对北斗RDSS、北斗RNSS各类产品进行认证测试的专用设备,整个系统功率的准确与否,不但直接影响捕获灵敏度、跟踪灵敏度和发射EIRP等直接功率指标的测试精度,还将影响定位精度、测速精度、启动时间和重捕时间等一系列性能和功能指标的测试结果。出于保证北斗产品认证测试准确性的目的,提出了一种分解测量加系统修正的方法,对系统功率值进行校准,并利用标准北斗终端的代表性指标对校准结果进行了验证,测试结果表明该校准方法有效,系统经校准后满足开展北斗卫星导航产品认证测试的要求。

BeiDou satellite navigation product certification testing system is a kind of special equipment for the certification testing of various products such as BeiDou RDSS and RNSS.The power accuracy of the whole system can not only affect directly the test accuracy of direct power specifications such as capture sensitivity, tracking sensitivity and launch EIRP value, but also affect the test results of performance and power specifications such as positioning ac curacy, speed measuring precision, start t ime , recapture time, etc. In order to ensure the certification test accuracy of BeiDou products , this paper proposes a method of decomposition measuring and system correction for calibrating the system power value and verifying the calibration results by using the typical specifications of standard BeiDou terminal. The test results show that the proposed method is effective, and the system can meet the requirements of BeiDou product certification and test after calibration.