| 快速高精度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. 快速高精度BPSK信号载波相位同步算法[J]. 北京理工大学学报, 2011, 31(7): 823-827 |
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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050081
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： | 提出了一种离散Fourier变换(DFT)和数字锁相环(DPLL)联合的二相相移键控(BPSK)信号载波相位同步算法.该算法采用平方运算和DFT对BPSK信号进行频率粗估计,通过设计数字锁相环快捕带宽,保证频率粗估计作初始频点的数字锁相环直接工作在快捕状态.数字锁相环经过约1个频率周期锁定,提供满足解调性能的精确同步载波信号.仿真表明,算法满足快速高精度载波同步要求,且避免了传统的锁频和锁相环联合算法锁定时间过长的问题.采用全数字结构,算法易于数字信号处理器(DSP)等数字芯片实现.
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| 关 键 词： | 离散Fourier变换 数字锁相环 二相相移键控 盲载波相位同步 |
| 收稿时间： | 2010-09-13 |
A Fast and Accurate BPSK Carrier Phase Recovery Algorithm |
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| LIU An-bang,AN Jian-ping and WANG Ai-hua. A Fast and Accurate BPSK Carrier Phase Recovery Algorithm[J]. Journal of Beijing Institute of Technology(Natural Science Edition), 2011, 31(7): 823-827 |
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| Authors: | LIU An-bang AN Jian-ping WANG Ai-hua |
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| Affiliation: | School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China;Science and Technology on Information Transmission and Dissemination in Communication Networks Laboratory, The 54th Research Institute of CETC, Shijiazhuang, Heb;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 Transmission and Dissemination in Communication Networks Laboratory, The 54th Research Institute of CETC, Shijiazhuang, Heb |
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| Abstract: | A BPSK carrier phase recovery algorithm is proposed that combines discrete Fourier transform with digital phase locked loop. For coarse frequency estimation, the algorithm adopts square algorithm and DFT to BPSK signal, and then initializes the DPLL frequency by the coarse frequency estimation, which satisfies that DPLL begins at pull-in range. The DPLL locks in through about one period and supplies the carrier signal to the modulation accurately. Simulation results show that the algorithm qualifies the fast and accurate synchronization, and avoids the shortage of longer time to lock that was needed by using traditional automatic frequency controller and PLL algorithm. Meanwhile, the proposed algorithm is easy for DSP chips to realize all digital structure. |
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| Keywords: | discrete Fourier transform digital phase locked loop binary phase shift keying (BPSK) blind carrier phase synchronization |
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