基于训练符号填充的高谱效TSP-OFDM水声通信技术研究

项目名称： 基于训练符号填充的高谱效TSP-OFDM水声通信技术研究

项目编号： No.61471221

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 王劲涛

作者单位： 清华大学

项目金额： 83万元

中文摘要： 随着加强海洋探索和提升国防实力的发展要求，实施国家海洋战略使得数字通信与海洋科学的结合成为研究和应用领域的热点。但目前，国际上水声通信的相关研究尚缺乏系统性，如何实现高数据率信息的远距离可靠传输仍有待研究。本课题针对具有传播延时长、多普勒扩展严重等特点的水声信道，研究基于训练符号填充的正交频分复用（TSP-OFDM）水声通信技术，提出创新性的高谱效传输体制，并结合多输入多输出（MIMO）系统的高维空间信号设计与自适应均衡等技术，为实现高速水声通信提供理论依据和技术支持。为此，在分析水声信道特征的基础上，本课题研究包括高谱效水声TSP-OFDM系统的信号结构、基于双选择性信道联合估计的信号重建、基于高维Hilbert空间信号处理的空间调制等一系列关键技术，以期取得突破。本课题研究具有良好的国内外合作基础和部分已有研究成果，具备初步试验条件，为水声通信技术研究及实现打好基础。

中文关键词： 水声通信；信道估计；信道均衡；水声信道

英文摘要： With the increasing demand to strengthen the ocean exploration and enhancenational defense strength, the implementation of maritime strategy makes the combination of digital communication and marine science become a hottest spot in both research and pracatical application. Till now, however, the world-wide research in the area of underwater acoustic communication is not systematic. High data rate and long distance reliable transmission should be furthur studied from both theoretical research and practical application scenarios. Aimed at the underwater acoustic channels with the long delay and severe Doppler spread, the main topic of our work is launched in underwater acoustic communication technique based on training symbol padded orthogonal frequency division multiplexing (TSP-OFDM), and to propose the innovative highly spectrum-efficient transmission system as well as the high-dimensional space signal design and adaptive channel equalization with multiple-input multiple-output (MIMO) technique. It is expected that the project would provide both the theoretical basis and technology support for the high speed underwater acoustic communication. To solve the above issues, based on the analysis of underwater acoustic channels, the work should propose serieses of key technologies and algorithms, including highly spectrum-efficient acoustic TSP-OFDM signal design, signal reconstruction based on joint parameter estimation for double-selective fading channels, spatial modulation based on high-dimensional Hilbert space signal processing and so on. There are laid foundation like international cooperation and preparation like some research results for our work. Besides, the elementary test platfrom is also available. It is expected that our work is important for the development of underwater acoustic communication in both theory and practice.

英文关键词： Underwater Acoustic Communication;Channel Estimation;Channel Equalization;Underwater Acoustic Channel