| 基于二项分布的快速盲频谱感知算法 |
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| 引用本文： | 苏杭,叶迎晖,卢光跃.基于二项分布的快速盲频谱感知算法[J].电视技术,2016,40(4):96-100. |
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| 作者姓名： | 苏杭 叶迎晖 卢光跃 |
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| 作者单位： | 西安邮电大学无线网络安全技术国家工程实验室,陕西西安,710121 |
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| 基金项目： | 国家自然科学基金项目(61271276,61301091)；陕西省自然科学基金项目（2014JM8299） |
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| 摘 要： | 基于特征函数的盲频谱感知算法(CAD)检测性能较好但运算量大.利用样本特征构造了新的检验统计量,推导了频谱空闲时检验统计量的概率密度函数和判决门限,分析了所提算法的检测性能和计算量,从而提出认知无线电中基于二项分布的快速盲频谱感知算法.理论分析和仿真表明,所提算法与CAD算法检测性能相当,同时运算量明显低于CAD算法.
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| 关 键 词： | 运算量 快速盲频谱感知 二项分布 样本特征 |
| 收稿时间： | 2015/9/21 0:00:00 |
| 修稿时间： | 2015/10/21 0:00:00 |
Fast and Blind Spectrum Sensing Based on Binomial Distribution |
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| SU Hang,YE Yinghui and LU Guangyue.Fast and Blind Spectrum Sensing Based on Binomial Distribution[J].Tv Engineering,2016,40(4):96-100. |
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| Authors: | SU Hang YE Yinghui and LU Guangyue |
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| Abstract: | The performance of the existing blind spectrum sensing algorithm based on characteristic function and Anderson-Darling test(CAD) is excellent, however, with heavily computation. In this paper, the sample feature is employed as the test statistic to sense the available spectrum for the cognitive users and a blind and fast spectrum sensing based on binomial distribution is proposed; the probability density functions(PDF) of test statistic under free of frequency channel is derived and then theoretical threshold is given. Finally, with comparison to CAD algorithm, analysis and numerical simulations show the proposed algorithm has almost comparable performances and low computation apparently. |
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| Keywords: | computation fast and blind spectrum sensing binomial distribution sample feature |
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