Application Research of Spectrum Sensing and Spectrum Allocation in Cognitive Satellite Networks

Due to the increasing demand for broadcasting, multimedia and interactive services, more and more communication devices are connected to satellite communication systems, satellite communication systems are facing the contradiction between the exhaustion of spectrum resources and the low utilization rate of spectrum. Applying cognitive radio technology to satellite communication systems can effectively improve the utilization of spectrum resources. In order to better study cognitive satellite communication, this article briefly introduces the basic principles of cognitive radio and describes the application scenarios of cognitive satellite communication. Through comparison and analysis, the research status, advantages and disadvantages of spectrum sensing and spectrum allocation algorithms in cognitive satellite network application scenarios are summarized, and the next research direction of cognitive satellite communication network is prospected, which lays the foundation for future research.