通信学报 ›› 2017, Vol. 38 ›› Issue (3): 144-153.doi: 10.11959/j.issn.1000-436x.2017058

• 学术论文 • 上一篇    下一篇

基于改进差分能量检测器的移动直扩水声通信研究

杜鹏宇1,郭龙祥3,3,殷敬伟2,3,乔钢2,3   

  1. 1 杭州应用声学研究所声纳技术重点实验室,浙江 杭州 310023
    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 哈尔滨工程大学水声工程学院,黑龙江 哈尔滨 150001
  • 修回日期:2016-12-17 出版日期:2017-03-01 发布日期:2017-04-13
  • 作者简介:杜鹏宇(1988-),男,黑龙江牡丹江人,博士,杭州应用声学研究所工程师,主要研究方向为水声通信、水声信号处理技术。|郭龙祥(1979-),男,黑龙江哈尔滨人,博士,哈尔滨工程大学副教授,主要研究方向为水声中的信号处理、通信技术、矢量信号处理技术等。|殷敬伟(1980-),男,黑龙江尚志人,博士,哈尔滨工程大学教授、博士生导师,主要研究方向为水声通信和极地声学。|乔钢(1974-),男,黑龙江哈尔滨人,博士,哈尔滨工程大学教授、博士生导师,主要研究方向为水声通信和水声信号处理技术。
  • 基金资助:
    国家自然科学基金资助项目(61471137);霍英东教育基金会青年教师基金资助项目(151007)

Mobile direct-sequence spread-spectrum underwater acoustic communication based on improved differential energy detector

Peng-yu DU1,Long-xiang GUO3,3,Jing-wei YIN2,3,Gang QIAO2,3   

  1. 1 Science and Technology on Sonar Laboratory,Hangzhou Applied Acoustic Research Institute,Hangzhou 310023,China
    2 Acoustic Science and Technology Laboratory,Harbin Engineering University,Harbin 150001,China
    3 College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001,China
  • Revised:2016-12-17 Online:2017-03-01 Published:2017-04-13
  • Supported by:
    The National Natural Science Foundation of China(61471137);Henry Fok Education Foundation for Young Teachers(151007)

摘要:

针对时变大多普勒干扰提出了基于直扩信号结构的多普勒估计方法,通过相邻接收扩频符号的匹配相关运算及能量检测可实现对接收扩频信号中的多普勒实时估计。同时,该方法充分利用扩频处理增益,在低信噪比条件下仍然可以完成多普勒估计。在此基础上,提出改进差分能量检测器接收机算法,通过比较接收端相关器输出能量完成解码,可有效应对多普勒效应带来的快速载波相位跳变干扰以及时变的多途扩展干扰,从而保证了直扩水声通信系统在复杂干扰条件下稳定可靠工作。通过计算机仿真及实际海试实验,成功实现了?10 dB信噪比时大多普勒干扰条件下的直扩水声通信,验证了所提算法的有效性和稳健性。

关键词: 扩频通信, 移动水声通信, 改进差分能量检测器, 多普勒估计

Abstract:

A Doppler estimation method based on the structural features of spread spectrum signal was proposed,which could achieve real-time Doppler estimation for received spread spectrum signals by energy detecting the result of matching correlation calculation of adjacent received spreading symbols.In addition,this method made full use of the spread spectrum processing gain and could do Doppler estimation under low SNR condition.Improved differential energy detector was further proposed,which can effectively deal with the rapid carrier phase fluctuation interference caused by Doppler effect and time-varying multi-path interference by detecting the output energy of two correlators.Simulation verified the robustness of improved differential energy detector algorithm and the Doppler estimation method based on spread spectrum signal.At-sea data shows that improved differential energy detector combined with the proposed Doppler estimation method can achieve low bit error rate communication for direct-sequence spread spectrum underwater acoustic communication with large time-varying Doppler interference when SNR is ?10 dB.

Key words: spread spectrum communication, mobile underwater acoustic communication, improved differential energy detector, Doppler estimation

中图分类号: 

No Suggested Reading articles found!