| PCM/FM遥测系统中用于去除多谱勒频率和载波频偏的新方法 |
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| 引用本文： | 郑立岗,吕幼新,向敬成,苟娟.PCM/FM遥测系统中用于去除多谱勒频率和载波频偏的新方法[J].信号处理,2004,20(3):236-240. |
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| 作者姓名： | 郑立岗 吕幼新 向敬成 苟娟 |
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| 作者单位： | 电子科技大学电子工程学院,610054 |
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| 摘 要： | 本文首先分析了均匀采样二阶DPLL(Digital Phase-Locked Loop)误差传递函数的特性,并基于均匀采样二阶DPLL误差传递函数的高通特性提出了脉冲编码调制/调频(PCM/FM)遥测系统中用于去除多谱勒频率和载波频偏的新方法;然后给出了设计实例和相应的计算机仿真结果;最后给出了有效的实现方法。计算机仿真结果表明,基于均匀采样二阶DPLL误差传递函数的高通特性用于去除多谱勒频率和载波频偏的方法是可行的。
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| 关 键 词： | PCM/FM遥测系统 均匀采样二阶数字锁相环 多谱勒频率 载波频偏 |
| 修稿时间： | 2003年5月6日 |
A New Technique to Remove Doppler Frequency and Carrier Frequency Bias in PCM/FM Telemetry System |
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| Zheng Ligang,Lu Youxin,Xiang Jingcheng School of Electronic Engineering,UESTC,Chengdu.A New Technique to Remove Doppler Frequency and Carrier Frequency Bias in PCM/FM Telemetry System[J].Signal Processing,2004,20(3):236-240. |
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| Authors: | Zheng Ligang Lu Youxin Xiang Jingcheng School of Electronic Engineering UESTC Chengdu |
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| Affiliation: | Zheng Ligang,Lu Youxin,Xiang Jingcheng School of Electronic Engineering,UESTC,Chengdu 610054 |
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| Abstract: | Firstly, erro transfer function of uniform sampling second-order DPLL is analyzed, and a new technique to
remove doppler frequency and carrier frequency bias in PCM/FM telemetry system, which is based on high-pass charasteristics of
uniform sampling second-order DPLL, is put forward,and then design examples and corresponding computer simulation results
are presented, finally an effective implementation technique is given. The computer simulation results indicate that the technique
to remove doppler frequency and carrier frequency bias in PCM/FM telemetry system based on high-pass characteristics of
uniform sampling second-order DPLL is feasible. |
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| Keywords: | PCM/FM telemetry system uniform sampling second-order digital phase-locked loop doppler frequency carrier frequency bias |
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