| 摘要: |
| 高空平台站通信是实现中继通信的重要手段，其受大气效应及多径效应制约严重，但网络仿真器中缺少针对高空平台通信系统的准确信道模型，无法进行有效的仿真分析。为此，从分析ITU-R模型与Ricean模型出发，在此基础上改进QualNet仿真器内置的信道模型，使之基本实现对真实空地链路信道的近似模拟，将该信道模型应用于网络仿真中，并分析信道特性对空地链路性能的影响。最后，搭建了基于QualNet的半实物仿真平台，进一步增强了空地链路仿真的准确性和合理性。该信道模型及仿真平台对高空平台站通信系统的参数设计、性能分析具有重要意义。 |
| 关键词: 高空平台站 空地链路 信道模型 QualNet仿真 |
| DOI： |
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| 基金项目:国家高技术研究发展计划(863计划)项目（2012AAXX） |
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| Modeling and QualNet simulation of air-ground link channel for high altitude platform station |
| ZHENG Yi,WANG Yu-wen,DENG Jie,SHANG Xiao-fu |
| () |
| Abstract: |
| High Altitude Platform station(HAPs) communication is an important way to realize relay communications. Its performance is seriously restricted by the atmospheric effect and multipath effect, however, network simulators lack a realistic air-ground link channel model which would allow having accurate simulation,so it is difficult to perform effective simulation and analysis. According to the analysis of ITU-R model and Ricean model,the channel model in QualNet is improved for the purpose of realizing the approximate simulation of the real air-ground link channel basically. The channel model is used in network simulation, and the influence of characteristics of channel on air-ground link performance is analyzed. Finally, hardware in the loop(HITL) simulation platform is built based on QualNet to further enhance the accuracy and rationality of the air-ground link. The channel model and simulation platform are helpful for HAPs communication system parameters selection and performance evaluation. |
| Key words: high altitude platform station air-ground link channel model QualNet simulation |
《电讯技术》编辑部 