Research Of Spectrum Allocation Algorithm In Cognitive Radio

As in recent years,scholars have studied radio communications industry,it has been rapid development.However,at the same time for the frequency of the radio frequency spectrum used it also greatly increased.Spectrum allocation methods currently exist more or less inherent in excessive waste of resources and,therefore,how to properly improve the utilization of spectrum resources become the main direction of research.As cognitive radio wireless communication in one,with its unique advantages spectrum surroundings can be perceived,and perceived idle spectrum were utilized to alleviate the problem of insufficient resources,thereby enabling the use of spectrum efficiency has been improved.To improve the current situation of scarce spectrum resources pointing out a new way.Firstly,in terms of spectrum holes starting time domain characteristics of currently available greedy algorithm were introduced,and has pointed out the shortcomings of the greedy algorithm,this results in the process of spectrum allocation,taking into account the time-domain and the importance of the frequency domain,and introduces a trigger several rounds of bidding auction model and Markov model for repairable systems,laying out a solid theoretical foundation for improving the greedy algorithm.Then the two algorithms were compared before and after improvements simulation and analysis,the results show that the improved greedy algorithm has a better performance in the transmission of data and overall throughput.Secondly,from the perspective of this paper,the existence of spectrum allocation in collusion starting bid auction for spectrum allocation formula common collusion done a thorough research and discussion,the first gives the definition of conspiracy microeconomic theory then combined with the background of its spectrum allocation concepts appropriate extension,pointingout the different systems may correspond to different earnings targets collusive behavior characteristics.Then introduced two common algorithms factor value first algorithm and the United algorithm conspiracy to suppress the advantages and disadvantages factor algorithm,and combine the two improved algorithms,the improved results.The last of these three algorithms for simulation analysis and results improved algorithm combined with an increase in system efficiency and suppression systems target collusion both have a distinct advantage.