| 认知无线电中协作能量概率分布频谱感知方法 |
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| 引用本文： | 李佳俊,谈振辉,韩峰,乔晓瑜.认知无线电中协作能量概率分布频谱感知方法[J].北京邮电大学学报,2011,34(Z1):19-22. |
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| 作者姓名： | 李佳俊 谈振辉 韩峰 乔晓瑜 |
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| 作者单位： | 北京交通大学宽带无线移动通信研究所;轨道交通控制与安全国家重点实验室(北京交通大学);马里兰大学电子和计算机工程系; |
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| 基金项目： | 国家高技术研究发展计划项目(2009AA011805,2009AA011302); 国家自然科学基金项目(61071075,60830001,61032002) |
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| 摘 要： | 提出了一种基于能量概率分布（EPD）的协作频谱感知算法,以提高认知无线电的检测性能．与传统能量检测使用能量均值做为检测统计量不同，EPD感知算法中的协作感知次用户统计大于给定门限值的采样信号个数，并传送给数据融合中心,数据融合中心将所有统计结果进行叠加，并与噪声的能量概率密度进行相关运算来获得判决结果．利用高斯近似理论分析所提出的EPD协作频谱感知算法的检测性能．仿真结果表明,协作用户数越多，新提出算法的检测性能比传统协作频谱感知硬判决算法越有优势，同时又不需要任何主用户的先验信息．
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| 关 键 词： | 认知无线电 频谱感知 能量概率分布 协作 |
Energy Probability Distribution of Cooperative Spectrum Sensing in Cognitive Radios |
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| LI Jia-jun,TAN Zhen-hui,HAN Feng,QIAO Xiao-yu.Energy Probability Distribution of Cooperative Spectrum Sensing in Cognitive Radios[J].Journal of Beijing University of Posts and Telecommunications,2011,34(Z1):19-22. |
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| Authors: | LI Jia-jun TAN Zhen-hui HAN Feng QIAO Xiao-yu |
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| Affiliation: | LI Jia-jun1,2,TAN Zhen-hui1,HAN Feng3,QIAO Xiao-yu1,2 (1.Research Institute of Broadband Wireless Mobile Communications,Beijing Jiaotong University,Beijing 100044,China,2.State Key Laboratory of Rail Traffic Control and Safety(Beijing Jiaotong University),3.Department of Electrical and Computer Engineering,University of Maryland,Maryland 20742,America) |
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| Abstract: | Cooperative spectrum sensing based on energy probability distribution(EPD) is proposed to improve the sensing performance of the cognitive radios.Instead of averaging the energy in the traditional energy detection scheme,each cooperative secondary user in the EPD scheme records the number of the received samples,its energy is over a given threshold.Correlation between the sum of the recorded numbers and the EPD of the noise is used at the data fusion center to reach a final decision.Gaussian approximation i... |
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| Keywords: | cognitive radio spectrum sensing energy probability distribution cooperation |
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