| 基于FLL与PLL级联的高动态载波跟踪技术 |
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| 引用本文： | 王兰芳,吴长奇,高秀英. 基于FLL与PLL级联的高动态载波跟踪技术[J]. 电子测量技术, 2009, 32(3): 25-27 |
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| 作者姓名： | 王兰芳 吴长奇 高秀英 |
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| 作者单位： | 燕山大学信息科学与工程学院,秦皇岛,066004;燕山大学信息科学与工程学院,秦皇岛,066004;燕山大学信息科学与工程学院,秦皇岛,066004 |
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| 摘 要： | 高动态给载波的跟踪带来了很大的困难,本文研究采用锁频环（FLL）和锁相环（PLL）相结合的方法来实现载波跟踪。对常用的叉积自动频率跟踪环（CPAFC）提出了改进,改进后的鉴频算法具有更宽的鉴频范围和更小的估计误差。通过MATLAB对整体环路进行了仿真,结果表明该环路可实现在低信噪比、多普勒频移为±300 kHz、频率一次变化率为30 kHz/s下实现载波的跟踪。
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| 关 键 词： | 高动态 载波跟踪 AFC |
Technology of carrier tracking for high dynamic signals based on FLL and PLL cascade |
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| Wang Lanfang,Wu Changqi,Gao Xiuying. Technology of carrier tracking for high dynamic signals based on FLL and PLL cascade[J]. Electronic Measurement Technology, 2009, 32(3): 25-27 |
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| Authors: | Wang Lanfang Wu Changqi Gao Xiuying |
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| Affiliation: | College of Information Science and Engineering;Yanshan University;Qinhuangdao 066004 |
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| Abstract: | Under the circumstances of high dynamic,it is difficult to achieve carrier tracking.The configuration of carrier tracking,which combining FLL with PLL,is presented in this paper.A improved CPAFC frequency control arithmetic is discussed in this paper.The range of the improved method is larger then CPAFC,and the error is less.At the same time,the loops is simulated by MATLAB and the simulation results show that the loops can track the signal one the conditions that the low SNR,the Dopper frequency varies at ... |
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| Keywords: | AFC |
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