期刊名称：International Journal of Innovative Research in Computer and Communication Engineering
印刷版ISSN：2320-9798
电子版ISSN：2320-9801
出版年度：2016
卷号：4
期号：1
页码：807
DOI：10.15680/IJIRCCE.2016.0401048
出版社：S&S Publications
摘要：With the rapid deployment of new wireless devices and applications, the last decade has witnessed a growing demand for wireless radio spectrum. However, the fixed spectrum assign nment policy becomes a bottleneck for more efficie nt spectrum utilization, under which a great portion of the licensed spectrum is severely under - utilized. The inefficient usage of the limited spectrum resources urges the spectrum regulatory bodies to review their policy and start to seek for innovative c ommunication technology that can exploit the wireless spectrum in a more intelligent and flexible way. The concept of cognitive radio is proposed to address the issue of spectrum efficiency and has been receiving an increasing attention in recent years, si nce it equips wireless users the capability to optimally adapt their operating parameters according to the interactions with the surrounding radio environment. There have been many significant developments in the past few years on cognitive radios. This pa per surveys recent advances in research related to cognitive radios. The fundamentals of cognitive radio technology, architecture of a cognitive radio network and its applications are first introduced. The existingworks in spectrum sensing are reviewed, an d important issues in dynamic spectrum allocation and sharing are investigated in detai
关键词：Cognitive radio (CR); platforms and standards; radio spectrum anagement; software radio; spectrum sensing; wireless communication
