New Progress in Research of Cognitive Radio
Qiaoyan Liu · Communications technology · 2010
With the development of information technology,wireless communication has been extensively applied,thus causing a shortage of spectral resource.For granted users,their spectrum is not used effectively,while for ungranted users,they could not find the available spectrum.This is one of the principal causes for shortage of spectral resource.Cognitive radio,as the focus in wireless communication research,provides a technology for making full use of spectral resource and overcoming the problem of spectral shortage.This paper analyzes the current situation of cognitive radio reseach,discusses the main challenge and the new progress,including the future development of cognitive radio.