北斗卫星导航系统功率增强选星策略设计与性能分析

Design and performance analysis of satellite selection strategy for BDS power enhancing

导航战中,卫星功率增强是提高战区卫星信号抗干扰能力的重要手段。以北斗二号(BDS-2)及北斗三号(BDS-3)星座为例,提出一种功率增强卫星选择方法。该方法利用卫星轨道预报信息,基于几何精度衰减因子(GDOP)阈值及功率增强卫星数量区间阈值信息,规划卫星功率增强选星策略。静态标准单点定位测试结果表明,该方法可减少功率增强卫星数量,并保证标准导航服务性能。

In navigation war,satellite power enhancing is one of the important measures to improve the robustness of satellite signal.Taking BeiDou navigation satellite(regional)System(BDS-2)and BeiDou-3 navigation satellite System(BDS-3)constellation into account,this paper describes a satellite selection strategy for BDS power enhancing.Based on the threshold of Geometric Dilution of Precision(GDOP)and power-enhanced satellite number interval,the optimal solution for each epoch can be iteratively approached.Experimental results of static Single Point Positioning(SPP)test demonstrate that the proposed approach can not only comparatively ensure SPP accuracy,but also lead a better performance in terms of attenuation on powerenhanced operation.