THE IMPACT OF TIME-BANDWIDTH PRODUCT ON THE ENERGY DETECTION IN THE COGNITIVE RADIO
The cognitive radio technology is an intelligent wireless communication system, which provides the opportunity to the secondary users for sharing the spectrum resources with the primary users. The core of cognitive radio is the spectrum sensing, which means detecting the free spectrum. Energy detection algorithm is applied most widely. Among these parameters of influencing detection performance of the energy detection, the time-bandwidth product plays a decisive role. It is defined as the product of the filter bandwidth and the time of the detection. In this article, the energy detection is analyzed theoretically and simulated from the point of the time-bandwidth product. The simulation results indicate that the detection performance will be improved with the increasing value of the time-bandwidth product. This provides the possibility for using the energy detection under the lower SNR, and shows the great meanings for the actual application of the energy detection.
cognitive radio energy detection time-bandwidth product detection performance
Guangyun Li Jian Fang Haifeng Tan Jingchun Li
Hebei University of Technology, Tianjin, China State Radio Monitoring Center, Beijing, China
国际会议
北京
英文
634-638
2010-10-26（万方平台首次上网日期，不代表论文的发表时间）