| 一种伽利略信号跟踪的多路径消除方法 |
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| 引用本文： | 赵毅,王庆,曾庆喜.一种伽利略信号跟踪的多路径消除方法[J].东南大学学报,2008,24(2):197-200. |
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| 作者姓名： | 赵毅 王庆 曾庆喜 |
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| 作者单位： | 东南大学仪器科学与工程学院,南京210096 |
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| 基金项目： | The National Key Technology R ＆D Program of China during the 11 th Five-Year Plan Period（ No. 2008BAJ11B05）. |
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| 摘 要： | 针对伽利略信号调制的特点，提出了一种基于滤波相关器法的多路径消除方法ELSC（early-late strobe correlator）．通过对滤波相关器法应用于伽利略E1信号的跟踪情况进行分析，发现滤波相关器法不能消除延迟为0．5个码片附近的多路径信号影响．ELSC方法通过对几个滤波相关器的叠加，能有效消除0．5个码片附近的多路径信号影响．通过仿真比较了ELSC方法和滤波相关器法对于伽利略信号的多路径误差包络．结果表明ELSC方法优于传统的滤波相关器法，不仅适用于伽利略信号的跟踪，同时也适用于GPS信号的跟踪．
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| 关 键 词： | 伽利略信号 GPS 多路径 延迟锁相环 滤波相关器 |
Multipath mitigation method for tracking Galileo signals |
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| Zhao Yi,Wang Qing,Zeng Qingxi.Multipath mitigation method for tracking Galileo signals[J].Journal of Southeast University(English Edition),2008,24(2):197-200. |
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| Authors: | Zhao Yi Wang Qing Zeng Qingxi |
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| Institution: | Zhao Yi Wang Qing Zeng Qingxi ( School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China) |
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| Abstract: | In order to improve the performance of multipath mitigation in tracking Galileo signals,a new multipath mitigation method named early-late strobe correlator(ELSC)is proposed.By applying the strobe correlator used widely in global positioning system(GPS)scenarios to Galileo E1 signals,it can be found that the strobe correlator has an undesirable level of performance when the delay of multipath signals is about 0.5 chip.Combining several strobe correlators,the ELSC can effectively mitigate the multipath effect especially for the multipath signals with the 0.5 chip delay.The multipath error envelopes between the strobe correlator and the ELSC are compared for Galileo E1 signals.The simulation results indicate that the ELSC performs excellently on multipath mitigation,and can be applied in both Galileo scenarios and GPS scenarios. |
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| Keywords: | GPS Galileo signal global positioning system (GPS) multipath delay-locked loop strobe correlators |
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