| 一种适用于认知超宽带的CUSUM频谱感知算法 |
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| 引用本文： | 宋晓鸥,向新,毕笃彦,陈顺方.一种适用于认知超宽带的CUSUM频谱感知算法[J].西安电子科技大学学报,2011,38(6):173-178. |
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| 作者姓名： | 宋晓鸥 向新 毕笃彦 陈顺方 |
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| 作者单位： | 空军工程大学工程学院;航空电子系统综合技术国防科技重点实验室; |
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| 基金项目： | 航空科学基金资助项目(20095596014) |
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| 摘 要： | 提出了一种新的认知超宽带频谱感知算法,该算法适合检测低平均信噪比、低占空比的超宽带脉冲信号,且具有复杂度低、检测延迟性能优越的特点.论文根据超宽带脉冲信号特性,给出形式统一的低占空比接收信号概率密度函数表达式,并采用累加和(CUSUM)算法实施检测.仿真结果表明,该算法对低占空比信号具有良好的适应性,有效克服了能量检测的信噪比门限效应,且检测延迟性能优越.
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| 关 键 词： | 认知超宽带 频谱感知 累加和 检测延迟 |
| 收稿时间： | 2011-05-23 |
Novel CUSUM spectrum sensing algorithm in cognitive UWB |
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| SONG Xiao'ou,XIANG Xin,BI Duyan,CHEN Shunfang.Novel CUSUM spectrum sensing algorithm in cognitive UWB[J].Journal of Xidian University,2011,38(6):173-178. |
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| Authors: | SONG Xiao'ou XIANG Xin BI Duyan CHEN Shunfang |
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| Affiliation: | (1. Engineering College, Air Force Eng. Univ., Xi'an 710038， China;
2. National Key Lab. of Sci. and Tech. on Avionics System Integration, Shanghai 200233， China) |
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| Abstract: | A novel Cognitive UWB spectrum sensing algorithm is proposed and evaluated,which enables the detection of the low average SNR and low duty ratio signal with low complexity and small detection delay.An uniform probability density function of the low duty ratio received signal is constructed based on the characteristic of the UWB pulse signal.CUSUM test is introduced to implement the detection.Theoretical analysis indicates that the proposed algorithm is suitable for low duty ratio signal detection.Compared w... |
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| Keywords: | cognitive UWB(CUWB) spectrum sensing cumulate sum(CUSUM) detection delay |
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