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论文:2018,Vol:36,Issue(6):1232-1235 |
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引用本文： |
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韩春雷, 白滢钰, 司江勃. 高动态环境下联合开环捕获和闭环跟踪的载波同步算法[J]. 西北工业大学学报 |
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Han Chunlei, Bai Yingyu, Si Jiangbo. Joint Carrier Synchronization Algorithm by Open-Loop Acquisition and Closed-Loop Tracking in High-Dynamic Environments[J]. Northwestern polytechnical university |
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| 高动态环境下联合开环捕获和闭环跟踪的载波同步算法 |
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| 韩春雷1, 白滢钰2, 司江勃3 |
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1. 中国电子科技集团公司 第二十研究所, 陕西 西安 710068;
2. 西安邮电大学, 陕西 西安 710100;
3. 西安电子科技大学, 陕西 西安 710071 |
| 摘要: |
| 针对高动态环境下载波同步困难和跟踪精度低的问题，提出联合开环捕获与闭环跟踪的高动态载波同步算法。首先，该算法通过开环捕获得到多普勒频率偏移及多普勒变化率偏移的粗估计，将剩余多普勒频率偏移和变化率偏移控制在一个较小的范围内。其次，在载波跟踪阶段采用三阶锁相环（PLL）对剩余多普勒频率偏移和变化率偏移进行跟踪。提出的算法同时具有快速捕获与精确跟踪的良好特性。最后，通过Matlab仿真对同步算法进行验证。仿真结果表明，当信噪比为8 dB，归一化多普勒频率偏移和多普勒变化率偏移分别在（-0.25，0.25）和（-10-4，10-4）范围内时，该算法的误码率相比理论值仅损失0.7 dB。 |
| 关键词:
高动态
载波同步
开环捕获
闭环跟踪
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| Joint Carrier Synchronization Algorithm by Open-Loop Acquisition and Closed-Loop Tracking in High-Dynamic Environments |
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| Han Chunlei1, Bai Yingyu2, Si Jiangbo3 |
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1. No. 20 Research Institute of CETC, Xi'an 710068, China;
2. Xi'an University of Posts & Telecommunications, Xi'an 710100, China;
3. Xidian University, Xi'an 710071, China |
| Abstract: |
| Considering the difficulty of carrier synchronization and the low tracking accuracy in high-dynamic environments, the joint open-loop acquisition and closed-loop tracking carrier synchronization algorithm is presented. Firstly, the algorithm derives the coarse estimation of Doppler frequency and Doppler rate via open-loop acquisition, then the residual Doppler frequency and Doppler rate are confined into a small range. Secondly, the residual Doppler rate is tracked by using a third-order phase-locked loop(PLL). The present algorithm has the advantages of fast acquisition and high tracking accuracy. Finally, the numerical simulation is conducted to verify the present synchronization algorithm. The simulation results indicate that at the signal to noise ratio(SNR) of and normalized Doppler frequency and Doppler rate ranging from to, the bit-error-rate(BER) performance degradation is as low as comparing with theoretical value. |
| Key words:
high-dynamic
carrier synchronization
open-loop acquisition
closed-loop tracking
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| 收稿日期: 2017-12-08
修回日期:
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| DOI: |
| 基金项目: 国家自然科学基金（51409214）与中国电子科技集团公司数据链重点实验室开放基金（CLDL-20182410）资助 |
| 通讯作者:
Email： |
| 作者简介: 韩春雷(1982-)中国电子科技集团公司博士、高级工程师,主要从事信息系统总体技术研究。
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参考文献: |
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[1] Scala B F La, Bitmead R R, Quinn B G. An Extended Kalman Filter Frequency Tracker for High-Noise Environments[J]. IEEE Trans on Signal Processing, 1996, 44(2):431-434
[2] Pak J M, Ahn C K, Lim M T. Self-Recovering Extended Kalman Filter for Frequency Tracking[C]//International Conference on Control, Automation and Systems, 2015
[3] 郇浩, 陶选如, 陶然,等. 多普勒频率变化率快速最大似然估计辅助的高动态载波跟踪环路[J]. 电子与信息学报, 2014, V36(3):577-582 Huan Hao, Tao Xuanru, Tao Ran, et al. Carrier Tracking Loop in High Dynamic Environment Aided by Fast Maximum Likelihood Estimation of Doppler Frequency Rate-of-Change[J]. Journal of Electronics & Information Technology, 2014,36(3):577-582(in Chinese)
[4] Won J H, Pany T, Eissfeller B. Iterative Maximum Likelihood Estimators for High-Dynamic GNSS Signal Tracking[J]. IEEE Trans on Aerospace & Electronic Systems, 2012, 48(4):2875-2893
[5] Su J, Tao H H, Rao X, et al. Coherently Integrated Cubic Phase Function for Multiple LFM Signals Analysis[J]. Electronics Letters, 2015, 51(5):411-413
[6] 邓晓东, 孙武. 基于FLL+PLL的载波跟踪环路设计[J]. 现代防御技术, 2010, 38(4):137-141 Deng Xiaodong, Sun Wu. Design of Carrier Tracking Loop Based on FLL+PLL[J]. Modern Defence Technology, 2010, 38(4):137-141(in Chinese)
[7] Umberto Mengali, Aldo N D'Andrea. Sychronization Techniques for Digital Receivers[M]. New York, Plenum Press, 1997:80-81
[8] Su Y T, Wu R C. Frequency Acquisition and Tracking in High Dynamic Environments[J]. IEEE Trans on Vehicular Technology, 2000, 49(6):2419-2429
[9] 吴华明, 苏雁泳, 刘爱军. 锁相环与锁频环在数字Costas环中的应用[J]. 科学技术与工程, 2010, 10(19):4645-4650 Wu Huaming, Su Yanyong, Liu Aijun. Application of PLL and FLL in the Digital Costas Loop[J]. Science Technology and Engineering, 2010,10(19):4645-4650(in Chinese) |
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