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随着信息技术的发展,无线通信得到广泛的应用,但同时人们面对频谱资源越来越匮乏的挑战。对授权用户而言,其频谱利用率极低,而对非授权用户而言,却找不到可以使用的频谱,这是导致频谱匮乏的重要原因之一。认知无线电作为无线通信的热点研究领域,它为提高频谱利用效率、解决频谱匮乏问题提供了技术支持,使研究人员看到了希望。文中分析认知无线电研究现状,讨论认知无线电研究的主要技术难题和最新进展,并提出新的发展方向。
With the development of information technology, wireless communication has been widely used, but at the same time, people face the challenge of more and more lack of spectrum resources. For authorized users, the spectrum utilization rate is very low, but for the non-authorized users, but can not find the available spectrum, which is one of the important reasons leading to the lack of spectrum. As a hot research field of wireless communication, cognitive radio technology provides technical support for improving the efficiency of spectrum utilization and solving the problem of spectrum starvation, so researchers have seen hope. This paper analyzes the status quo of cognitive radio research, discusses the main technical problems and the latest progress of cognitive radio research, and puts forward a new direction of development.