| 多信道认知网络的直观信道感知策略 |
| |
| 引用本文： | 许悠,赵熠飞,李云洲,邹红星.多信道认知网络的直观信道感知策略[J].清华大学学报(自然科学版),2011(11):1534-1538. |
| |
| 作者姓名： | 许悠 赵熠飞 李云洲 邹红星 |
| |
| 作者单位： | 清华大学自动化系信息处理研究所;清华大学无线与移动通信研究中心; |
| |
| 基金项目： | 国家“九七三”重点基础研究发展计划项目(2007CB310608); 国家科技支撑计划项目(2008BAH30B04); 国家科技重大专项课题(2009ZX03003-009); 长江学者和创新团队发展计划资助项目 |
| |
| 摘 要： | 为了提高频谱利用率,认知无线电技术可使非授权用户在不影响授权用户正常通信的情况下,利用瞬时的频谱空穴满足自身通信需求。如何通过感知频谱及时有效地发现频谱空穴是一个至关重要的问题,尤其是对于多信道认知无线电网络。针对多信道认知无线电网络,该文在连续时间Markov链的信道占用模型基础上,根据信道状态可能发生变化的概率,提出了一个动态的直观信道感知策略,并考虑了感知周期的影响。仿真结果表明:在感知周期合适的情况下,该策略能够有效地发现并利用频谱空穴,并且比周期感知和随机感知策略消耗更少的能量用于感知。
|
| 关 键 词： | 无线通信 认知无线电 频谱感知 动态频谱接入 连续时间Markov链 |
Intuitive spectrum sensing strategy for multi-channel cognitive radio networks |
| |
| XU You,ZHAO Yifei,LI Yunzhou,ZOU Hongxing.Intuitive spectrum sensing strategy for multi-channel cognitive radio networks[J].Journal of Tsinghua University(Science and Technology),2011(11):1534-1538. |
| |
| Authors: | XU You ZHAO Yifei LI Yunzhou ZOU Hongxing |
| |
| Institution: | XU You1,ZHAO Yifei2,LI Yunzhou2,ZOU Hongxing1(1.Institute of Information Processing,Department of Automation,Tsinghua University,Beijing 100084,China,2.Wireless and Mobile Communications Research and Development Center,China) |
| |
| Abstract: | To increase spectrum utilization,cognitive radio allows secondary users(SUs) to exploit instantaneous spectrum holes while limiting interference to primary users(PUs).A key problem is to discover the spectrum holes in a timely and efficient manner,especially for multi-channel cognitive radio networks.The probability of a channel state change was used to develop a dynamic intuitive spectrum sensing policy for one SU overlaying a continuous time Markov chain(CTMC) modeled multi-channel primary network.The eff... |
| |
| Keywords: | wireless communication cognitive radio spectrum sensing dynamic spectrum access continuous time Markov chain |
| 本文献已被 CNKI 等数据库收录！ |
|
