| 高稳定BPSK信号载波相位同步算法 |
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| 引用本文： | 刘安邦,安建平,王爱华.高稳定BPSK信号载波相位同步算法[J].北京理工大学学报,2011,31(7):828-832. |
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| 作者姓名： | 刘安邦 安建平 王爱华 |
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| 作者单位： | 1. 北京理工大学信息与电子学院,北京 100081;中国电子科技集团公司第54研究所通信网信息传输与分发技术重点实验室,河北,石家庄050181
2. 北京理工大学信息与电子学院,北京,100081 |
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| 基金项目： | 国家“八六三”计划项目，中国电子科技集团重点实验室开放课题 |
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| 摘 要： | 基于二相相移键控(BPSK)信号幅度剧烈变化会严重影响数字锁相环的环路带宽和稳定性,提出了一种数字自动增益控制(AGC)和锁相环(PLL)联合的高稳定BPSK信号载波相位同步算法.采用指数增益放大非相关反馈自动增益控制环路对输入调制信号进行幅度调整,使输出AGC的调制信号幅度稳定在预定值,再将幅度稳定调制信号输入到数字三阶PLL进行精确载波相位估计.仿真结果表明,算法避免了数字三阶PLL由于调制信号幅度变化带来的环路不稳定,且在信噪比(SNR)动态范围内,保证环路噪声性能满足BPSK信号解调的要求.
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| 关 键 词： | 自动增益控制 数字三阶锁相环 二相相移键控 载波相位同步 |
| 收稿时间： | 2010/9/13 0:00:00 |
A High Stable BPSK Carrier Phase Recovery Algorithm |
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| LIU An-bang,AN Jian-ping and WANG Ai-hua.A High Stable BPSK Carrier Phase Recovery Algorithm[J].Journal of Beijing Institute of Technology(Natural Science Edition),2011,31(7):828-832. |
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| Authors: | LIU An-bang AN Jian-ping and WANG Ai-hua |
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| Institution: | School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China;Science and Technology on Information Transimission and Dissemination in Communication Networks Laboratory, The 54th Research Institute of CETC, Shijiazhuang, He;School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China;School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China;Science and Technology on Information Transimission and Dissemination in Communication Networks Laboratory, The 54th Research Institute of CETC, Shijiazhuang, He |
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| Abstract: | Acute change of BPSK signal amplitude seriously affects the PLL's bandwidth and stability. A high stable synchronization algorithm for BPSK carrier phase is presented in this article that unifies the techniques of digital automatic gain controller (DAGC) and DPLL. The non-coherent DAGC, which adopts an exponential gain controlled amplifier, adjusts the modulated signal amplitude to the settled value, and then the amplitude-stable signal input to the third order DPLL to recovery accurate carrier phase. Simulation results confirm that the presented algorithm could prevent the instability of third order DPLL from the change of signal amplitude. It also satisfies the requirements of BPSK demodulation performance when the signal is within the intended SNR range. |
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| Keywords: | automatic gain controller digital third order phase locked loop binary phase shift keying(BPSK) carrier phase synchronization |
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