王森;王雪;霍翔;饶永南;陈校非;卢晓春;

• 1:中国科学院国家授时中心
• 2:中国科学院精密导航定位与定时技术重点实验室
• 3:中国科学院大学电子电气与通信工程学院
• 4:中国科学院大学天文与空间学院

摘要(Abstract)：

北斗全球卫星导航系统B1C信号采用正交复用二进制偏移载波(QMBOC)调制,具有更高的跟踪精度。但在非理想信道传输过程中,QMBOC信号多峰特性存在跟踪模糊的问题,同时,多径效应引起的信号畸变会影响定位精度。基于QMBOC信号研究了Bump-Jump、双重估计(DET)跟踪算法,基于窄相关器、高分辨率相关器(HRC)机理推导了多径误差表达式,提出了HRC与DET组合的无模糊多径抑制算法,对比分析了不同组合算法在多径干扰下的跟踪精度,仿真了不同多径误差表达式参数变化下的多径误差包络。研究结果表明,HRC鉴相器与DET组合方法比窄相关技术抗多径能力改善了39%,DET与HRC组合方法对QMBOC信号跟踪稳定性最优,实现了QMBOC信号无模糊多径抑制跟踪。

关键词(KeyWords)： BDS正交复用二进制偏移载波(QMBOC)信号;Bump-Jump;双重估计(DET);窄相关技术;高分辨率相关器(HRC);无模糊跟踪;多径抑制

Abstract:

Keywords:

基金项目(Foundation): 中国科学院青年创新促进会人才资助项目

作者(Author): 王森;王雪;霍翔;饶永南;陈校非;卢晓春;

Email:

DOI: 10.13875/j.issn.1674-0637.2020-02-0153-16

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