一种移动FH-FSK通信多普勒估计方法

王维伟; 孙慧嵩; 颜宏璐

doi:10.11993/j.issn.2096-3920.2019.06.005

一种移动FH-FSK通信多普勒估计方法

doi: 10.11993/j.issn.2096-3920.2019.06.005

王维伟¹,
孙慧嵩^2,3,4,
颜宏璐^2,3,4

1.
大连测控技术研究所, 辽宁大连, 116013
2.
哈尔滨工程大学水声技术重点实验室, 黑龙江哈尔滨, 150001
3.
工业和信息化部海洋信息获取与安全工信部重点实验室哈尔滨工程大学, 黑龙江哈尔滨, 150001
4.
哈尔滨工程大学水声工程学院, 黑龙江哈尔滨, 150001

基金项目: 国家重点研发计划(2018YFC0308500, 2017YFC0305702); 中国科学院水声环境特性重点实验室开放课题(SHHJ- KFKT-1801)

详细信息

作者简介:
王维伟(1982-), 男, 高级工程师, 主要研究方向为水声通信技术.

中图分类号: TJ630.34; TN929.3
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- 文章访问数: 374
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- 被引次数: 0
出版历程
- 收稿日期: 2019-04-06
- 修回日期: 2019-05-21
- 刊出日期: 2019-12-31

A Doppler Estimation Method of Mobile FH-FSK Communication

1.
Dalian Scientific Test and Control Technology Institute, Dalian 116013, China
2.
Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China
3.
Key Laboratory of Marine Information Acquisition and SecurityHarbin Engineering University, Ministry of Industry and Information Technology, Harbin 150001, China
4.
College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001, China

摘要

摘要: 在进行水下移动通信时, 多普勒效应会对信号造成影响, 常规估计多普勒频偏因子的方法是通过发射多普勒敏感脉冲信号进行估计。在跳频通信-频移键控(FH-FSK)通信中, 单个码片具有较好的多普勒敏感性, 文中采用32个跳频码片作为同步信号, 对同步信号中逐个码片进行多普勒因子估计。在多普勒因子选择时, 提出进行2次卡尔曼滤波后再取中值的方法, 使估计值更接近准确值。考虑到多普勒效应对同步造成的影响, 采用同步后进行多普勒补偿再次同步的方法, 进一步减少解码时由于同步偏差较大带来误判的可能性。仿真试验结果表明, 基于卡尔曼滤波的多普勒因子选择方法能使多普勒估计值更贴近理论值, 且重同步后通信误码率降低。该方法能够提高多普勒估计精度, 进一步提升移动FH-FSK通信性能。
- 水下通信 /
- 跳频通信-频移键控通信 /
- 多普勒估计 /
- 卡尔曼滤波
Abstract: During underwater mobile communication, the signals will be affected by Doppler effect. The conventional method for estimating the Doppler frequency offset factor adopts transmission of Doppler sensitive pulse signal. In fre-quency hopping frequency-shift keying(FH-FSK) communication, single chip has better Doppler sensitivity. In this paper, 32 frequency hopping chips are used as synchronizing signals, and Doppler factor estimation is performed for the chips one by one in the synchronizing signal. In the Doppler factor selection, two times of Kalman filtering are performed to obtain the median value so as to make the estimated value more accurate. Considering the influence of the Doppler effect on synchronization, the method of Doppler compensation after synchronization and resynchronization is adopted to further reduce the possibility of misjudgment caused by large synchronization deviation during decoding. Simulation results show that the Doppler factor selection method based on Kalman filter can make the Doppler estimation closer to the theoretical value and reduce the bit error rate after resynchronization. It is proved that this method can improve the accuracy of Doppler estimation and the performance of mobile FH-FSK communication.
- underwater communication /
- frequency hopping frequency-shift keying(FH-FSK) communication /
- Doppler estimation /
- Kalman filtering

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参考文献(13)

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