卫星导航信号体系设计研究

针对卫星导航当前面临导航信号测量性能提高、应用环境更加苛刻、导航频段频谱资源紧张等需求,合理的信号体制和各类标准的相辅相成是卫星导航系统持续稳定运行的重要保障。该文在梳理和分析国内外公开的卫星导航信号体制的基础上,研究了卫星导航信号的载波频率、调制方式、信道编码、导航电文等关键组成要素,简要剖析了各组成要素对系统兼容性、互操作性、码跟踪捕获性能、抗干扰性、抗多径及用户终端成本等方面的影响,开展了卫星导航信号设计的需求分析,设计提出了一种卫星导航信号设计标准体系。

Design research on satellite navigation signal structure

As the emerging of navigation satellite systems and developing of positioning technology principle,the basic theory research of navigation signal system is going deeper step by step.Seeking for a satellite navigation signal system which meets the function and performance demand of navigation,positioning and timing is the basic structure of various navigation satellite systems.Under the requirement promotion of navigation measurement performance increases,more harsh environment and navigation frequency shortage,the reasonable design of navigation signal system has significant effect to the accuracy,anti-interference and compatibility of the navigation satellite system,and various standards are the powerful support to maintain the system operation and specify the industrial market of navigation application.The integration of navigation system design and standards will provide theory support and significant guarantee for the sustainable and stable operation of navigation satellite system.On the basis of arranging and analyzing the current signal structure of navigation satellite system at home and abroad,the paper made a comprehensive inquiry to the key elements of satellite navigation signal,such as carrier frequency,modulation method,channel encoding and navigation message,dissected the effect of each key element to system compatibility,interoperability,code tracking and capture capability,anti-interference performance,mitigating multipath and user terminal costing,conducted requirement analysis for signal structure and designed a standard for satellite navigation signal structure.