电讯技术2017，Vol.57Issue(6)：629-634,6.DOI:10.3969/j.issn.1001-893x.2017.06.003
一种低速采样的协同宽带频谱感知方法
A Cooperative Spectrum Sensing Method Based on Low Rates Sampling
摘要
Abstract
Spectrum sensing is a key capability to enhance the anti-jamming and intelligence level of a communication system.The narrowband spectrum sensing performance of cognitive radio system is restricted by the technological progress of the analog digital converter,so it is difficult to realize the high real-time performance and wideband detection in system.In response to the problem,a method is proposed based on cooperative wideband spectrum sensing between multi-cognitive nodes in the network.In order to achieve high real-time performance and wideband detection of cognitive network system,the method reduces the sampling rate by making cognitive nodes perform sub-Nyquist sampling on the sensing frequency band,and realizes the positioning and judgment of jamming signal in the wide range of frequency through the centralized fusion and decision mechanism based on energy detection.The simulation and experimental results show that the proposed method can achieve 90％ detection probability under the condition that compression ratio is 0.025.So the method is correct and reliable.关键词
认知无线电/宽带频谱感知/协作频谱感知/次奈奎斯特采样/能量检测Key words
cognitive radio/wideband spectrum sensing/cooperative spectrum sensing/sub-Nyquist sampling/energy detection分类
信息技术与安全科学引用本文复制引用
吴迪..一种低速采样的协同宽带频谱感知方法[J].电讯技术,2017,57(6):629-634,6.基金项目
国防科技重点实验室基金项目(9140C020203150C02008) （9140C020203150C02008）
