【摘要】 惯性/卫星超紧组合技术核心将卫星导航接收机基带信号处理过程中的环路非线性信息与惯性导航信息进行深层次互耦合。在研究超紧组合多信息源异型耦合架构特征及互耦合机理的基础上,对比分析了超紧组合非相干及相干互耦合方法,总结了不同超紧组合观测矢量提取方法及环路模型,然后设计了超紧组合互耦合信息处理流程及信号NCO(数控振荡器)控制方法。最后,利用仿真平台对非相干及相干方式进行了卫星信号受干扰及载体动态变化环境下的试验对比分析,结果表明超紧组合相干方法相较于非相干方式具有更优的观测矢量提取性能及抗干扰性能。更多还原

【Abstract】 The core technique in ultra-tightly coupled INS/GNSS is mutual coupling in deep level for INS navigation solution and nonlinear loop measurements in GNSS receiver baseband signal processing. This paper analyzes the non-coherent and coherent ultra-tight integration algorithms based on studying the feature of multi-source ultra-tight integration with different structures and mutual coupling mechanism. The estimation methods of observation vector and loop models are summarized. The information processing procedure and NCO(Numerical control oscillator) controlled methods in ultra-tight integration are designed. Simulation tests are carried out to compare the performances of non-coherent and coherent ultra-tight integration algorithms under signal interference and dynamic variation environments. Test results indicate that the coherent method can provide better performances in observation-vector-extraction and anti-jamming than the non-coherent method.更多还原