中文摘要：

为定量研究不同层次GNSS多星座组合系统的性能提升情况,构建相应的量化指标,并对多星座组合系统的性能提升进行量化分析。通过仿真实验验证量化指标的有效性,分析组合系统性能提升随组合层次和截止高度角的变化规律,推出各层次的最优系统组合。实验表明,高层次多星座组合系统不仅改善了单一、低层次多星座组合构型的不足和缺陷,还在很大程度上提升了星座的各项性能指标。

英文摘要：

For quantitatively researching the performance improvements of different levels of the GNSS multi-constellation integrated navigation system,this paper constructs the corresponding quantitative indicators to analyze the performance improvements of the system quantitatively.Through a simulation experiment,it verifies the validity of indexes,and analyzes the rule of the performance improvements of the system,along with combination levels and cut-off elevation angle changes,and proposes the optimal system combination at all levels.The paper demonstrates that the high-level of the multiconstellation system not only improves the flaws of single and low-level configurations,but it also largely enhances the performance of constellation.