摘要
低轨星座的快速发展为实现全球高性能卫星导航增强服务提供了有利条件。围绕以低空无人驾驶等为代表的新兴应用场景对高精度实时定位导航的应用需求,针对传统播发手段覆盖范围有限、信道容量不足、落地功率较低等现实问题,阐述了一种基于低轨星座的新型导航信号增强技术,深入剖析了循环码移键控调制原理,提出了一种基于码片或者码周期分时复用的新型循环码移键控调制方式,并从不同维度分析了信号特性,同时进行了解调验证。结果表明,采用复合多进制循环码移键控调制方式可有效提升导航增强信息传输速率,具备工程实施可行性,可为基于低轨的导航信息增强、实现分钟级厘米级快速精密定位提供重要支撑。
The rapid development of Low Earth Orbit(LEO)constellations provides favorable conditions for the realization of global high performance navigation enhancement services.Focusing on the application requirements of high precision real-time positioning navigation in emerging application scenarios such as unmanned driving,a new signal enhancement technology based on LEO satellites is introduced in the paper,aiming at the practical problems such as limited coverage,insufficient channel capacity,low landing power,etc.The principle of cyclic code shift keying is deeply analyzed.A novel modulation based on chip or code period time division multiplexing is proposed.The signal characteristics are analyzed from different dimensions,and modulation verification is also carried out.The results show that the multiple code shift keying modulation can effectively improve the transmission rate of enhanced navigation information,which is feasible in engineering implementation,and can provide important support for the enhancement of navigation based on low orbit and the realization of minute-level fast and precise positioning incentimeter-level.
作者
麻军伟
翟建勇
刘若辰
田宇
贺延伟
MA Junwei;ZHAI Jianyong;LIU Ruochen;TIAN Yu;HE Yanwei
出处
《现代导航》
2025年第1期1-7,13,共8页
Modern Navigation
关键词
导航增强
复合码移键控
信号增强
低轨星座
Navigation Augmentation
Multiple Code Shift Keying
Signal Augmentation
Low Earth Orbit
