| 摘要: |
| 由于卫星频谱资源日益短缺，逐渐出现了资源“假性枯竭”的问题，但通信系统的频谱利用率却很低，因此必须提高卫星网络的频谱利用率。认知卫星通信能够解决这一问题。为了能够更好地研究认知卫星通信，简要阐述了认知无线电的基本原理，介绍了认知卫星通信的应用场景，通过分析和对比，总结了频谱感知及分配技术和功率控制技术的研究现状和优缺点，并展望了下一步的研究方向，为以后的研究奠定了基础。 |
| 关键词: 认知卫星通信 频谱利用率 频谱感知 功率控制 |
| DOI： |
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| 基金项目: |
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| Review of spectrum sensing and resource allocation in cognitive satellite communication |
| LIU Rui,ZHU Shibing,LI Changqing,SHUAI Haifeng |
| (School of Space Information,Space Engineering University,Beijing 101416,China) |
| Abstract: |
| Due to the increasing shortage of satellite spectrum resources,the problem of ‘pseudo exhaustion’ of resources gradually appears.However,the spectrum utilization rate of communication system is very low,so it is necessary to improve the spectrum utilization rate of satellite network.Cognitive satellite communication can solve this problem.In order to investigate cognitive satellite communication better,this paper briefly describes the basic principles of cognitive radio,introduces the application scenarios of cognitive satellite communication,summarizes the research status,advantages and disadvantages of spectrum sensing and distribution technology and power control technology through analysis and comparison,and looks forward to the future research direction,which lays a foundation for future research. |
| Key words: cognitive satellite communication spectrum utilization spectrum sensing power control |
《电讯技术》编辑部 