短波应急通信网中协作通信技术的研究

发布时间：2019-06-18 14:05

【摘要】：短波通信具有抗毁能力强、设备简单、通信距离远、应用灵活、运行成本低等特点，在应急通信中运用短波通信有着很高的促进作用。但短波信道易受衰落、多径和节点移动的影响，导致短波通信环境较差，严重的影响了系统性能。协作通信作为现代无线通信领域中重要的通信技术之一，通过单天线终端相互协作，共享彼此天线，形成虚拟多天线发射阵列，以此构成协作MIMO系统；同时将传统MIMO中的空时编码理论应用其中，不仅能够有效获得空间分集增益和编码增益，抵抗多径衰落并提高应急通信网性能，而且最主要的是为协作通信技术迈向实用提供了一种新实现办法。本文主要对短波应急通信网中协作通信技术的应用进行了研究论证。首先对常用的应急通信手段进行了优劣性分析，进而对短波应急通信网的设计进行了阐述和分析，然后构建了基于短波通信的应急通信网模型及其拓扑结构，并阐述分析了短波应急通信网的主要性能指标。其次，介绍了协作通信的相关技术原理，重点介绍了协作分集技术和基于空时编码的协作通信技术，然后在此基础上介绍分析了传统MIMO技术及其应用限制，进而引出了协作MIMO系统和分布式Alamouti空时分组码，并对其进行深入的分析研究。最后，重点探讨了短波应急通信网中协作通信技术实现的方案。通过构建短波应急通信网的协作模型，，对系统容量、误码性能、能量效率和网络寿命分别进行分析与仿真。实例分析说明，将协作通信应用于短波应急通信网中，可以有效提高短波应急通信网性能。在论文结尾，对本文进行了总结并对今后协作通信在短波应急通信网中的研究方向做了展望。
[Abstract]:The short-wave communication has the characteristics of strong anti-destruction capability, simple equipment, long communication distance, flexible application, low operation cost and the like, and has high catalytic effect in the application of short-wave communication in emergency communication. But the short-wave channel is susceptible to fading, multi-path and node mobility, resulting in poor short-wave communication environment and seriously affecting the performance of the system. The cooperative communication, as one of the important communication technologies in the field of modern wireless communication, forms a cooperative MIMO system by cooperating with each other through a single antenna terminal, forming a virtual multi-antenna transmission array, and simultaneously applying the space-time coding theory in the traditional MIMO, The method not only can effectively obtain the spatial diversity gain and the coding gain, resist the multi-path fading and improve the performance of the emergency communication network, but also the most important is to provide a new implementation method for the cooperative communication technology. In this paper, the application of cooperative communication technology in short-wave emergency communication network is studied. Based on the analysis of the advantages and disadvantages of the commonly used emergency communication means, the design of the short-wave emergency communication network is described and analyzed, then the emergency communication network model based on short-wave communication and its topological structure are constructed, and the main performance of the short-wave emergency communication network is analyzed and analyzed. Secondly, the relevant technical principle of cooperative communication is introduced, the cooperative diversity technology and the cooperative communication technology based on space-time coding are introduced, then the traditional MIMO technology and its application limitation are introduced, and then the cooperative MIMO system and the distributed Alamouti space-time are introduced. a block code and an in-depth division of the block code In the end, the cooperative communication technology in short-wave emergency communication network is discussed. According to the scheme, the system capacity, the error code performance, the energy efficiency and the network life are respectively carried out by building a cooperation model of the short-wave emergency communication network, Analysis and simulation. The example analysis shows that the cooperative communication is applied to the short-wave emergency communication network, and the short-wave emergency can be effectively improved. The performance of communication network. At the end of the thesis, this paper summarizes and studies the future cooperative communication in the short-wave emergency communication network.
【学位授予单位】：兰州交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN925

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