摘要
针对卫星导航信号体制抗多径性能的分析需求,在论述L1/E1/B1频段(1575.42MHz)最新卫星导航信号体制的基础上,分别推导得到基于非相干超前减滞后处理和反正切鉴别器下的码跟踪多径误差包络和载波相位跟踪多径误差的解析表达式,仿真分析了接收机早迟码间距、前端预相关带宽和导航信号调制方式等设计因素对多径误差产生的影响。分析结果表明:为了提高抗多径性能,BDS的B1-C公开服务信号可采用类似Galileo E1OS组合方式的MBOC(6,1,1/11)调制;BDS的B1授权信号可建议优化为BOCcos(15,2.5)调制。
Aiming at analysis requirement to anti-multipath performance of satellite navigation signal system, on the basis of expounding modulation types of latest navigation signal system on L1/E1/B1（1575.42MHz） frequency band, the analytical expressions of code tracking multipath error envelope and carrier phase multipath error based non-coherent early minus late process discriminator and arctangent discriminator was deduced respectively, the effect of receiver correlation distance, receiver front-end bandwidth and navigation signal modulation types to multipath error were analyzed through simulation. The results show that B1-C open service signal of BDS should adopt MBOC（6,1,1/11） modulation of similarly Galileo E1 OS combination mode, and B1 authorized signal of BDS recommend to optimize for BOCcos（15,2.5） modulation in order to improve anti-multipath performance.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2016年第1期106-113,共8页
Journal of System Simulation
基金
国家自然科学基金(61174194)
关键词
导航信号体制
码跟踪
载波相位跟踪
多径误差分析
navigation signal system
code tracking
carrier phase tracking
multipath error analysis
