2020-08-19
,不论是否考虑噪声不确定性,KNN在低信噪比时检测概率都比较高,突破了低信噪比对传统能量检测的限制;当噪声不确定度为3dB,信噪比小于4dB时,ED算法失效,采用KNN算法能得到较高的检测概率。最后,本文在
国家自然科学基金资助项目(6186303)
云南大学信息学院,昆明 650091,云南大学信息学院,昆明 650091,云南大学信息学院,昆明 650091;云南省高校谱传感与边疆无线电安全重点实验室,昆明 650091
2009-05-31
本文提出了基于匹配滤波器 PN 码捕获、改进的多码元累加门限判决以及多驻留捕获验证的统一框架,运用建模和统计分布的数学方法分析了整个系统的检测概率、虚警概率、平均捕获时间三个最重要系统指标。仿真表明
重庆大学通信工程学院,重庆大学通信工程学院,重庆大学通信工程学院,重庆大学通信工程学院
2011-09-02
法不仅可以提高低信噪比下的检测概率,而且可以改善合作频谱感知的安全性。
中国矿业大学物联网研究中心,中国矿业大学信息与电气工程学院,中国矿业大学物联网研究中心,中国矿业大学信息与电气工程学院,江苏 徐州 221000,中国矿业大学物联网研究中心,中国矿业大学信息与电气工程学院,江苏 徐州 221000
2012-09-13
制用于统计主用户的历史状态信息并获取状态转移概率的估计值。最后,通过蒙特卡罗仿真验证了采用感知信任策略可以降低错误检测概率,感知性能获得一定的提升。
北京邮电大学信息与通信工程学院,北京 100876,北京邮电大学信息与通信工程学院,北京 100876
2009-12-29
在传统的无线通信系统中,接收机各个子模块只前向传递信息,这种直线的信息处理方式会因损失有用软信息而造成性能下降。基于Turbo迭代思想的联合迭代检测译码算法联合处理检测器和译码器,经过循环迭代后,系统可以充分利用检测器的软信息和信道译码器的软信息。仿真结果表明,经过一定次数的循环迭代之后,系统能取得高性能增益。
北京邮电大学信息与通信工程学院
WANG Qian,YUE Dianwu,LAU Francis
In this paper, we investigate the performance of cooperative spectrum sensing over fading channels. We derive the upper-and lower-bounds of the overall false alarm probability and overall detection probability as a function of the bit error probabilities of the cognitive radio-fusion center (CR-FC) links. Given an overall false alarm probability or overall detection probability, we derive the relationships of error probabilities of the CR-FC links that should be satisfied. We also investigate the relationship between the overall detection probability and the overall false alarm probability when the SNR of the primary user signal at each CR node is small.
2011-04-28
Research Fund for the Doctoral Program of Higher Education of China Ministry of Education under (Grant 20092125110006)
College of Information Science and Technology, Dalian Maritime University,College of Information Science and Technology, Dalian Maritime University,Department of Electronic and Information Engineering, The Hong Kong Polytechnic University
HU Yao-Yue,LIU Huai-Yuan,LIANG Jing
In this paper, we propose three cluster-head election schemes using fuzzy logic systems (FLSs) for clustered radar sensor networks. Three factors of a radar sensor (RS) are considered in our FLS design: its remaining energy (RE); the fading envelope of the signal transmitted by the RS to base station (FESTRBS); its distance to base station (DBS). The three cluster-head election schemes are named FF (FLS with two-antecedents & fuzzy-c means (FCM) ), FFSVD (FLS with two-antecedents, FCM, and singular value decomposition-QR (SVD-QR)), and FF3SVD (FLS with three-antecedent FLS, FCM and SVD-QR). Their clustering performances in terms of detection performances and networks' lifetime are compared and analyzed. Monte Carlo simulations show that among these three cluster-head election schemes, FF3SVD provides the lowest energy consumption and moderate probability of target detection (PD), and FFSVD offers moderate power loss and the highest PD, whereas FF has the worst clustering performances.
2015-12-02
Doctoral Fund of Ministry of Education of China (20110185120003)
Department of Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731 ,Department of Electrical Engineering, University of Electronic Science and Technology of China,Department of Electrical Engineering, University of Electronic Science and Technology of China
2010-01-06
来确定最终的杂波分布及参数。根据得到的参数进行恒虚警率检测,从而将目标从图像中提取出来。实践表明,本算法计算迅速,检测概率高,能够为后续的识别工作提供较好的检测结果。
哈尔滨工程大学,哈尔滨工程大学
2018-06-15
算法的缺点,着眼于节点安全性和算法实现的复杂性,从融合中心处进行优化,并对所提出的方法进行了仿真测试。仿真结果表明,改进的检测算法可以在一定程度上提高了检测概率,实现了在开销允许的情况下,提高了感知结果的
哈尔滨工程大学信息与通信工程学院,哈尔滨 150001,哈尔滨工程大学信息与通信工程学院,哈尔滨 150001
2009-03-02
视觉效果, 提高融合图像的空间表达能力,突出了异常点,可以很好的提高目标检测概率及降低虚警概率。
国家自然科学基金(60672034)
教育部博士点基金(20060217021)
黑龙江省自然科学基金重点项目(ZJG0606-01)(ZJG0606-01)
哈尔滨工程大学信息与通信工程学院,哈尔滨工程大学信息与通信工程学院,哈尔滨工程大学信息与通信工程学院