面向海洋信息传感网的水下MIMO协作网络编码传输方法

The underwater transmitting systems in ocean information sensor networks are typical cases with limited information transmission capability and this is extremely asymmetric with humanity's increasing ocean information underwater transmitting needs. This fact is the bottleneck which redistricts the development of underwater wireless sensor networks. Traditional technological schemes cannot solve the above problem radically, but cooperative communication with network coding provides a good idea for breaking through this bottleneck. However, the system performance enhancing mechanism of introducing network coding to underwater cooperative transmission system needs exploring furtherly and the system’s resource allocation also needs optimal design. Under this background, this project takes designing suitable network coding transmission schemes for underwater cooperative communications and promoting system performance as its final target. Firstly, underwater cooperative communication systems with multi-source serving are modeled through the feature analysis of underwater acoustic channels; then, network coding based underwater MIMO cooperative transmitting method is proposed and the interaction mechanism of network coding is explored; finally, power allocation scheme based on network coding are designed and optimized to get the enhanced system performance. Through these key technologies research, the project solves problems for the application of network coding in ocean underwater acoustic communications, enhance the transmission efficiency of underwater systems and promotes the development of China’s ocean information technologies.

海洋信息传感网的水下传输系统是典型的信息传输能力受限的系统，这与人类对海洋信息与日俱增的水下传输需求呈现严重的非对称性，是制约水下传感器网络发展的瓶颈。传统技术方案难以根本解决这一难题，而基于网络编码的协作通信技术为突破这一瓶颈提供了新思路。但是，在水下协作传输系统中引入网络编码对于系统性能提升的作用机理还需要进一步探究，系统的资源分配也需要进行优化设计。在这种背景下，本项目以设计适合海洋信息水下传输的协作网络编码传输方案提升系统性能为目标，首先通过分析水声信道的特点来建立多源服务的水下协作通信系统模型，然后提出基于网络编码的海洋信息水下MIMO协作传输方案并探究网络编码的作用机理，最后以提升系统性能为优化目标设计了基于网络编码的功率分配方案。通过对这些关键技术的研究，为网络编码在海洋水声通信中的应用解决技术难题，提升水下传输系统的有效性，推动我国海洋信息技术的发展。

本项目以基于网络编码的协作通信技术解决海洋信息传感网的信息传输能力受限问题。以设计适合海洋信息水下传输的协作网络编码传输方案提升系统性能为目标，首先通过分析水声信道的特点来建立多源服务的水下协作通信系统模型，然后针对单水声换能器情形提出了基于网络编码的海洋信息水下协作传输方案，针对多水声换能器情形提出了基于网络编码的海洋信息水下MIMO协作传输方案，最后以提升系统性能为优化目标设计了基于网络编码的协同功率分配方案。通过本项目的研究，提出了可行的技术方案，拓宽了研究领域，发表了相关学术论文9篇，培养了博士生2人和硕士生3人。项目组也积极参与了多项国际交流与合作。本项目的研究工作为网络编码在海洋水声通信中的应用解决了技术难题，推动了我国海洋信息技术的发展。