Spectrum assignment with spectrum hole classification in cognitive mobile telecommunication systems

The frequency resource of mobile communication systems is intensive and it needs to combine with cognitive radio technology. The mobile telecommunication system subscribers are sensitive to interference, making the interference problem need prompt solution. This paper analyzes the inter-system and intra-system interference and proposes the approach of utilizing spectrum holes classification. The spectrum assignment algorithm with spectrum hole classification is come out with and the simulation results prove that the proposed algorithm can eliminate the inter-system interference, decrease the drop ratio of primary users and weaken the intra-system interference.