Optimal Threshold for Dual-stage Spectrum Sensing in Cognitive Radio

被引：0
|
作者：
Deng, Sumin [1 ]
Ji, Yanli [1 ]
Zhou, Fan [1 ]
Du, Lei [1 ]
Wang, Ben [2 ]
Wang, Weidong [1 ,3 ]
机构：
[1] Beijing Univ Posts & Telecommun, Informat & Elect Technol Lab, Beijing, Peoples R China
[2] China Elect Technol Grp Corp, Res Inst, Beijing, Peoples R China
[3] Minist Educ, Key Lab Univ Wireless Commun, Wirral, Merseyside, England
来源：
2013 8TH INTERNATIONAL ICST CONFERENCE ON COMMUNICATIONS AND NETWORKING IN CHINA (CHINACOM) | 2013年
基金：
高等学校博士学科点专项科研基金;
关键词：
cognitive radio; spectrum sensing; SUML; dualstage; threshold;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Cognitive radio (CR) is a typical technology to allow secondary users use the licensed spectrum resource dynamically. Spectrum sensing is one of the important technics in CR. In this paper, optimal threshold for dual-stage spectrum sensing is researched. Two-threshold energy detection (ED) and one-threshold cyclostationary feature detection (CFD) are chosen as the coarse sensing technique and the fine sensing technique respectively. Given the characteristics of the two sensing techniques, optimal thresholds of dual-stage spectrum sensing are deduced based on Sequential Unconstrained Minimization Technique. Both sensing speed and accuracy are considered at the same time to get the optimal sensing performance. The simulation results show that the optimal thresholds improve the performance of spectrum sensing compared with the existing representative dual-stage sensing scheme.
引用
收藏
页码：963 / 968
页数：6
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