一种浅海信道自适应调制水声通信方案  

A shallow sea channel adaptive modulation underwater acoustic communication scheme

作　　者：邱逸凡 李爽 童峰[1,2] QIU Yi-fan;LI Shuang;TONG Feng(Key Laboratory of Underwater Acoustic Communication and Marine Information Technique of the Ministry of Education,Xiamen University,Xiamen 361005,China;College of Earth and Ocean Sciences,Xiamen University,Xiamen 361005,China)

机构地区：[1]厦门大学水声通信与海洋信息技术教育部重点实验室,福建厦门361005 [2]厦门大学海洋与地球学院,福建厦门361005

出　　处：《舰船科学技术》2021年第19期158-162,共5页Ship Science and Technology

基　　金：国家自然科学基金资助项目(11274259);声呐技术重点实验室基金项目。

摘　　要：对于具有强烈随机变化多径、噪声、多普勒的水声信道,采用单一调制方式、固定参数的水声通信系统很难满足高质量水声通信的需求。本文提出根据信噪比、多径数和多普勒频偏进行信道质量评估并通过切换通信制式优化调整的自适应调制水声通信方案,利用浅海信道海试实验数据进行的分析表明,自适应调制方案在信道状况变差时可改善通信性能。For underwater acoustic channels with strongly random variation of multipath,noise,and Doppler,it is difficult for an underwater acoustic communication system with a single modulation method and fixed parameters to meet the requirements of high-quality underwater acoustic communication.This paper proposes an adaptive modulation underwater acoustic communication scheme that evaluates channel quality based on signal-to-noise ratio,multipath number,and Doppler frequency offset,and optimize the adjustment by switching communication methods.The analysis using the experimental data of the shallow sea channel shows that the adaptive modulation scheme can improve the communication performance when the channel condition becomes worse.

关 键 词：水声通信 自适应调制 自适应区间 多径 

分 类 号：TN929.3[电子电信—通信与信息系统]