OPNET卫星网络通信节点天线仿真与分析

摘要天线作为卫星通信系统的基本组成部分，在地面及空间用户间的信息传输过程中起到了十分重要的作用 [1]。论文对地面站及卫星的天线形式和指向性的建模问题展开讨论，所设计开发的卫星天线模型为空间网络仿真系统提供了技术支撑，论文开展的主要工作如下：（ 1 ）介绍了卫星通信系统的主要组成、卫星通信天线的基本原理以及 OPN E TModeler 网络仿真工具的建模思想以及方法；（ 2 ）针对卫星通信链路的特点，基于 OPNET 从链路建立的判断条件和链路通信质量两个方面进行了卫星通信链路的设计；（ 3 ）详细介绍了在 OPNET 中进行天线建模的原理，从天线方向图和外部模型接口两个角度入手，开展了卫星通信天线的设计工作；（ 4 ）在 OPNET 网络仿真软件中搭建了典型卫星通信场景，利用对地静止卫星（ GEO ）和低轨卫星（ LEO ）实现了两个远距离地面节点之间的通信过程。同时，利用探针搜集了网络通信中的误码率这个典型统计量，并对有无天线指向处理模块的系统通信性能进行了对比和分析。论文最后对全文进行了总结，提出了当前研究工作中的不足，并对今后需要进一步深入研究和探讨的方面进行了阐述。61072
毕业论文关键词卫星通信系统 OPNET 无线链路天线仿真建模空间网络
Title S imulation and A nalysis for an tenna of Satellitenetwork communication based on OPNETAbstract Abstract Abstract AbstractA s a n essential part of the satellite communication system ,a ntenna playsa very important role of the informat ion transmission between ground andspace .T his paper discusses on the modeling problem of the antenna form anddirectivity . T he design and development of satellite antenna model providesthe technical support for the space network simulation system . The main workof this paper is as follows :(1) Introduces t he main composition of satellite communication system ,the basic theory of satellite communication antenna and the modeling ideaand methods of OPENT Modeler network simulation tool ;(2) According to the characteristics of the satellite communicationlink , the paper design s a new satellite communication link based onOPNET , considering the judgment condition of link establishment and linkcommunication quality ;(3) I ntroduces the theory of antenna modeling based on OPNET , Indetail , from the two angles of the antenna pattern model and externalinterface . this paper carried out the satellite communication antennadesign work;(4) Set s up typical satellite communication scenarios using the OPNETnetwork simulation software , the geostationary satellite ( GEO ) andlow-earth orbit satellite (LEO ) are applied to realize the communicationprocess between the two ground nodes over a long distance. at the same time ,using the probe to c ollect the error rate and throughput of networkcommunication , and compare s and analyze s the system communication performance with or without the antenna tracking.F inally, the paper summarize s the full text . it point es out the shortagesexisting in the current work , as well as suggesting the further study andexploration in the future.
Key words satellite communication system OPNET Wireless link antennaSimulation and Modeling Space Network

1绪论..1

1.1课题背景及意义..1

1.2国内外研究水平综述1

1.3论文研究思路与主要工作.2

2卫星通信概述及OPNET仿真建模基础..4

2.1卫星通信概述..4

2.2卫星通信天线..5

2.3OPNETModeler仿真建模基础..8

2.4本章小结..10

3基于OPNET的卫星通信链路建模..11

3.1卫星通信链路的特点11

3.2OPNET无线管道阶段.11

3.3卫星链路模型的设计13

3.4本章小结..16

4基于OPNET的天线建模17 OPNET卫星网络通信节点天线仿真与分析:http://www.youerw.com/zidonghua/lunwen_66678.html