Spectrum sensing in ultra-wideband system based on cognitive radio

作     者：QIN Ji-xin ZHANG Shi-bing 

作者机构：School of Electronics and lnformation Nantong University Nantong 226019 China 

出 版 物：《通讯和计算机（中英文版）》 (Journal of Communication and Computer)

年 卷 期：2008年第5卷第11期

页      面：37-41页

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 

基　　金：Acknowledgments: This work was supported by the National Science Foundation of China (No. 60872002)  the Universities Natural Science Research Project of Jiangsu Province (No. 07KJB510091) and the Application Research Project of Nantong City (No. K2007014) 

主　　题：无线电频谱 无线通信系统 通信技术 探测信号 

摘      要：The radio frequency spectrum is a scarce natural resource and its efficiency has attracted lots of attention in both academia and industry. A fundamental problem facing the future wireless systems is where and how to find suitable spectrum bands to satisfy the demand of the consumer s insatiable appetite for data rate and enable new consumer market segments. A promising technique to improve the spectrum utilization is the ultra-wideband access based on cognitive radio (UWB-CR). Spectrum sensing, as a key enabling functionality in cognitive radio networks, needs to reliably detect signals from primary radios to avoid harmful interference. This paper is focused on the spectrum sensing technique. First, architecture of UWB-CR system was proposed. Then an overview of the spectrum sensing schemes was provided and compared. It is concluded that the optimal spectrum sensing scheme for UWB-CR system is the matched filter detection.