Galileo短时突发搜救信号载波跟踪的锁相环设计 |
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作者姓名: | 曾晖 李集林 |
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作者单位: | 中国空间技术研究院航天恒星公司; |
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摘 要: | Galileo搜救信号转发器搭载于Galileo导航卫星,能实现对全球遇险用户信号的转发,这种搜救信号具有突发、短时的特点,一般的F/PLL跟踪环无法对其进行有效的载波跟踪并完成解调。文中提出一种利用载波辅助的锁相跟踪方法,通过理论分析和MATLAB仿真可知,此锁相环能在约50m s内达到同步,可以有效地完成Galileo搜救信号的解调。
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关 键 词: | Galileo搜救信号 突发 短时 PLL 载波辅助 |
Design of PLL in the Carrier Tracking of Galileo Short-time Search and Rescue Burst Signal |
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Authors: | Zeng Hui Li Jilin |
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Abstract: | The Galileo search and rescue signal transmitter is carried on the Galileo navigation satellite,which can transmit the global distress user signal to the ground,it is a burst and short-time signal,so the carrier tracking and demodulation cannot be effectively completed by the common F/PLL tracking loop.This paper presents a PLL tracking method combined with carrier assistance.According to the result of theoretical analysis and MATLAB simulation,we can see that this loop can achieve synchronization in about ... |
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Keywords: | Galileo search and rescue signal Burst Short-time PLL Carrier assistance |
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