| 多径效应对非相干延迟锁定环的影响 |
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| 作者姓名： | 宋伟宁 张彦仲 邵定蓉 李署坚 文霄杰 |
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| 作者单位： | 北京航空航天大学电子信息工程学院; |
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| 基金项目： | 国家“863”计划基金资助项目(2008AA04A104) |
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| 摘 要： | 多径是影响伪码测距及定位精度的重要误差源之一。研究多径效应对非相干延迟锁定环的影响,给出多径信道下的最大测距误差公式,指出存在多径时的S曲线斜率的变化规律,并分析多径对跟踪环路噪声性能的影响。仿真及分析结果表明,多径引起了鉴相曲线的零点漂移,并导致了更大的噪声抖动。
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| 关 键 词： | 多径效应 非相干延迟锁定环 测距。 |
Influence of Multipath on Non-Coherent Delay-Lock Tracking Loop |
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| Authors: | Song Weining Zhang Yanzhong Shao Dingrong Li Shujian Wen Xiaojie |
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| Institution: | Song Weining,Zhang Yanzhong,Shao Dingrong,Li Shujian,Wen Xiaojie |
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| Abstract: | Multipath is one of the most important error sources of ranging and positioning system based on the direct sequence spread spectrum.This paper analyzes the impact of multipath on the ranging error.The ranging error formula is given.The influence of multipath on the slope of S curve is presented.The effect of multipath on the tracking loop noise performance is studied.The result shows that multipath can cause zero drift and result in larger noise jitter. |
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| Keywords: | Multipath Non-coherent delay-lock tracking loop Ranging |
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