Spectrum Sensing and the Utilization of Spectrum Opportunity Tradeoff in Cognitive Radio Network
Cognitive radio (CR) is proposed to use the spectrum opportunistically. In this letter, we study the tradeoff between the spectrum sensing performance and the utilization of spectrum opportunity in the CR network. We formulate the tradeoff problem mathematically. The optimum tradeoff mainly depends on the activity of primary user. Cooperative spectrum sensing is also studied based on the methodology of the proposed tradeoff problem. We perform the numerical analysis to quantify the effects of different parameters on the optimal spectrum sensing time.
The similarity and difference of regional distributions between management science publication and NSFC's management science fund are compared. Two scientometric models rank-frequency distribution and concentration measurement are used to show whether or not the amount of grants awarded to different provinces by the National Natural Science Foundation of China (NSFC) match with the research capacity of given provinces as indicated by its management science publication