Research On Resource Management Methods In Off-Orbit Satellite Communication System

With the growth of people's demand for multimedia services,a simple terrestrial communication system can no longer meet the requirements.The satellite communication system has unparalleled advantages in coverage and networking,and it is one of the rapidly developing communication means in the communication field.Due to the rapid development of satellite communication systems,currently available frequency band congestion will become more and more serious,and the probability of mutual interference will become greater and greater.Therefore,the research on the issue of co-channel interference in satellite communication systems is becoming increasingly urgent.It is of great significance to improve the spectrum compatibility of satellite systems.In this paper the same frequency interference suppression technology in satellite communications and terrestrial cellular systems,satellite communication system for frequency compatibility problems,put forward based on the inhibition of different satellite adaptive encoding modulation angle selection between same frequency interference and suppression scheme based on sub channel scheduling strategy for multi beam satellite beam between the same frequency interference,to solve the satellite communication system with frequency interference problem.The main research work of this paper is as follows:1)Based on the study of different orbit satellite communication system,analysis method is put forward with the same frequency than the current density and the interference of noise based on equivalent power interference,the signal-to-noise ratio,the equivalent power density analysis of ground stations of different orbit satellite interference of same frequency,the solution is user,quantitative calculation the satellite ground station,and the modular design of the interference,the results for the different orbit with frequency and make the reference plan.2)The basic theory of co channel interference suppression between different satellites is studied,and the advantages and disadvantages of the same frequency interference suppression methods of existing islanding satellites are analyzed.The method of adaptive coding and modulation for the same frequency interference with the adaptive coding and modulation of the ISO satellite using the interference angle is proposed.The results show that the method not only makes the stationary orbit satellite undisturbed,but also ensures the communication status of the non stationary orbit satellite system.3)On the basis of the difference between the multi beam satellite communication system and the ground cellular system,the ground cellular system is studied to suppress the inter-frequency interference between the cells.Puts forward a method based on user priority scheduling sub channel suppression of beam multi beam satellite communication system with frequency interference,the method of realizing adaptive channel allocation by sub channel scheduling strategy,the results show that this method can significantly improve the communication performance of high priority users.