基于带宽优化的载波跟踪算法

牟伟清; 刘荣科; 宋青平; 段瑞枫

doi:10.13700/j.bh.1001-5965.2014.0715

基于带宽优化的载波跟踪算法

doi: 10.13700/j.bh.1001-5965.2014.0715

北京航空航天大学电子信息工程学院, 北京 100191

基金项目: 国家"863"计划(2012AA120602);教育部新世纪优秀人才支持计划(NCET-12-0030);国家自然科学基金重大研究计划(91438116)

详细信息

作者简介:
牟伟清(1986-),男,山东烟台人,博士研究生,weiqing0017@163.com

通讯作者:
刘荣科(1973-)男,教授,rongke_liu@buaa.edu.cn,主要研究方向为空天信息传输与处理、无线多媒体通信、专用集成电路设计.

中图分类号: V443⁺.1
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出版历程
- 收稿日期: 2014-11-18
- 修回日期: 2014-12-19
- 网络出版日期: 2015-10-20

Carrier tracking algorithm based on bandwidth optimization

School of Electronic and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: 在现有的高动态微弱信号的载波跟踪算法中,针对锁频环(FLL)辅助锁相环(PLL)载波跟踪算法,环路调整不连续,易出现跟踪失锁的问题,给出了FLL与PLL的更优组合算法,并确定了组合环路状态转换的过程以及环路状态转换的门限值,从而优化环路性能;针对带宽调整不准确影响环路跟踪性能的问题,分析得出最优带宽值,确定了试探法带宽调整策略,对环路带宽进行实时调整,最终在信噪比为3dB,且存在加加速度分量时,环路的跟踪误差达到3Hz左右.
- 高动态 /
- 低信噪比 /
- 载波跟踪 /
- 锁频环 /
- 锁相环
Abstract: In the existing high dynamic weak signal carrier tracking algorithm, frequency locked loops (FLL) auxiliary phase locked loops (PLL) carrier tracking algorithm has the problem that the loop adjusted discontinuously, and easily lost lock. More optimal combination FLL with PLL algorithm and transition process of combination loop were given, threshold for state transition was determined. Aiming at the problem that bandwidth adjustment is not accurate, the optimal PLL loop bandwidth and the bandwidth adjustment strategy were confirmed, the loop bandwidth was adjusted in real-time. In the presence of jerk cases and signal-to-noise ration is 3dB, the tracking error is around 3Hz.
- high-dynamic /
- low signal-to-noise ratio /
- carrier tracking /
- frequency locked loops /
- phase locked loop

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参考文献(16)

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