| 认知无线电网络中压缩协作频谱感知 |
| |
| 引用本文： | 石磊,周正,唐亮,孙璇,张静.认知无线电网络中压缩协作频谱感知[J].北京邮电大学学报,2011,34(5):76-79. |
| |
| 作者姓名： | 石磊 周正 唐亮 孙璇 张静 |
| |
| 作者单位： | 泛网无线通信教育部重点实验室(北京邮电大学),北京,100876;北京邮电大学信息与通信工程学院,北京,100876 |
| |
| 基金项目： | 国家高技术研究发展计划项目(2009AA01Z262);国家自然科学基金项目(60772021);国家科技重大专项项目(2009ZX03006-006/-009);高等学校博士学科点专项科研基金项目(20070013029);Korean Ministry of Knowledge Economy Project(IITA-2009-C1090-0902-0019) |
| |
| 摘 要： | 低频谱利用率条件下的信道状态向量具有稀疏性，为降低认知无线电网络中各个认知用户的频谱感知冗余，基于压缩感知技术提出了一种低复杂度的协作频谱感知方法. 仿真结果表明，通过稀疏观测矩阵提高了单个认知用户感知过程的速度和效率；在融合中心对观测数据进行重构过程中使用因子图迭代算法，大幅降低了计算难度；同时可以根据认知网络中的频率使用情况，自适应调整认知用户的感知点数，确保整个网络的高效感知.
|
| 关 键 词： | 认知无线电网络 协作频谱感知 压缩感知 因子图 |
| 收稿时间： | 2010-12-31 |
Compressed Collaborative Spectrum Sensing in Cognitive Radio Networks |
| |
| SHI Lei,ZHOU Zheng,TANG Liang,SUN Xuan,ZHANG Jing.Compressed Collaborative Spectrum Sensing in Cognitive Radio Networks[J].Journal of Beijing University of Posts and Telecommunications,2011,34(5):76-79. |
| |
| Authors: | SHI Lei ZHOU Zheng TANG Liang SUN Xuan ZHANG Jing |
| |
| Affiliation: | 1.Key Laboratory of Universal Wireless Communications(Beijing University of Posts and Telecommunications),Ministry of Education, Beijing 100876,China; 2.School of Information and Communication Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China) |
| |
| Abstract: | The channel state vector is sparse under the conditions of low spectral efficiency. Based on compressed sensing technology, a low complexity collaborative spectrum sensing method is proposed to reduce the redundancy of each user in the cognitive radio networks. The processing speed and the efficiency of the single cognitive node are improved through the sparse measurement matrix. The fusion center reconstructs the observed data by the iterative algorithm of factor graph, dramatically reducing the computation. According to the frequency usage, the cognitive nodes adjust the sampling rate adaptively to ensure the maximum efficiency in the whole networks. |
| |
| Keywords: | cognitive radio networks collaborative spectrum sensing compressed sensing factor graph |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《北京邮电大学学报》浏览原始摘要信息 |
|
点击此处可从《北京邮电大学学报》下载全文 |
|
