集中式协作频谱检测在SimpliciTI网络中的应用  

Application of centralized cooperative spectrum sensing in SimpliciTI network

作　　者：张洪欣[1,2] 张起彤[1,2] 刘锦宇 

机构地区：[1]北京邮电大学电子工程学院,北京100876 [2]北京邮电大学安全生产智能监控北京市重点实验室,北京100876

出　　处：《哈尔滨工程大学学报》2015年第8期1147-1152,共6页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(61571063;61202390)

摘　　要：针对目前Simplici TI协议单点频谱检测存在的自干扰和隐藏终端问题,为了提高无线传感网络的抗干扰能力,根据协作频谱检测原理,提出了基于半投票规则的集中式协作频谱检测的协作频率捷变(cooperative frequency agility,CoFA)机制,并应用于Simplici TI协议。该机制不仅发挥了协作频谱检测在减小多径、阴影效应及隐藏终端问题方面的优势,还能够解决传统FA机制的自干扰问题。实验测试表明此方法可以有效地解决原FA机制的自干扰问题,并且使Simplici TI的频谱检测性能平均提升42%。In this paper, a centralized cooperative frequency agility （CoFA） based on the half-voting-rule cooperative spectrum sensing is proposed and applied in SimplieiTI protocol. SimpliciTI performs poorly in single node spectrum detection and there exist self-interference and hidden terminal problems. Therefore, CoFA is proposed to improve the anti-interference capability of wireless sensor networks. It has remarkable advantage in avoiding mul- tipath, shadow effect, hidden terminal problem, and solves the self-interference problem in traditional FA. Finally, the test showed that the method proposed could effectively solve the self-interference problem in former FA and in- creases 42% in average of the frequency sensing performance in SimpliciTI.

关 键 词：协作频谱检测 频率捷变 认知无线电 抗干扰通信 隐藏终端 

分 类 号：TN915[电子电信—通信与信息系统]