基于混合星座的卫星导航系统功率增强服务性能分析

An analysis of service performance for enhancing power of satellite navigation system based on mixed constellation

在导航战中,卫星功率增强技术是提高战区卫星导航系统生存能力的重要措施。针对导航战背景下如何保持Compass系统对我国领土及周边区域导航服务能力的问题进行了研究,提出了一种基于混合星座和最优GDOP值准则的卫星导航系统功率增强方案,并就功率增强覆盖区域在不同实现方式条件下的覆盖性、可用性和实现复杂度等性能进行了对比分析。分析结果表明,采用"5GEO+4MEO"的功率增强组合形式,可以实现对我国领土及近海区域的全天时覆盖,可用性水平达到100%(GDOP<6.3),同时具有实现复杂度低和系统稳定性好等特点,可作为我国区域功率增强的备选方案。

In navigation war,the technique of satellite power-enhancement has been an important measure to improve the viability of the satellite navigation system.With regard to the problem about how to maintain the navigation capabilities of Compass system for the territory of China and the surrounding area in the context of navigation war,this researcg presents a satellite navigation system power enhancement program based on mixed constellation and guidelines of best GDOP value.Then,the effect to the performance of coverage,availability and implementation complexity in area covered by power enhancement signals under different realization types was analyzed.The results from simulation show that ＇5GEO＋4MEO＇ combination of power enhancement can achieve all-time coverage with the avalibility level of 100%（GDOP6.3） for our country＇s territory and coastal regions.Furthermore,this scheme also has the quality of low complexity and good stability and can be introduced as a regional power enhanced options.